trek x caliber 6 2019

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Trek X Caliber 6 Review

September 15, 2023

‍ Key Takeaways

• If you’re shopping for a used hardtail bike, the X-Caliber 6 is an inexpensive option that performs well.
• Newer bikes will get you more advanced components at the same MSRP if you want to upgrade.
• Component highlights include the Sram X4 drivetrain and Shimano hydraulic disc brakes.

This article may contain affiliate links where we earn a commission from qualifying purchases.

‍ If you’re looking for an entry-level hardtail, it can be hard to sort through the options. This review will help you decide if the Trek X-Caliber 6 is for you.

The Trek X-Caliber 6 is a solid bike overall for anyone just getting into mountain biking. Trek continued this bike after 2016, but you should be able to find it used for a good deal. If you want the modern replacement, the Trek Marlin 6 has similar performance with updated components and design.

I am a dedicated hardtail rider, and I love finding bikes that let you ride hard without needing complex rear suspension. For this review I dug into the details on the Trek X-Caliber 6 and compared it to similar bikes to give you everything you need to know before making a purchase.

TABLE OF CONTENTS

‍ Trek X-Caliber 6 Performance

Coming in at $750 MSRP, the Trek X-Caliber 6 is definitely an entry-level mountain bike, so you shouldn’t expect mind-blowing performance. For what it is, the Trek X-Caliber 6 does a good job. With cross-country-oriented geometry and budget (though highly functional) components, it’s ready for fun laps on flowy trails.

It does offer a confident, stable ride that provides real off-road fun on moderate trails. Would I tackle aggressive Moab terrain on this bike? Probably not. But for laid-back riding around local singletrack trail centers, this is a competent choice.

With relatively old school cross-country-inspired geometry, this mountain bike isn’t designed for shredding downhill. If things get steep and rough, this bike will feel out of its element pretty quickly.

Rather than taking this on the roughest terrain you can find, you need to chase out smooth, flowy singletrack where you can feel in complete control and really have fun. The front suspension will get overwhelmed by big hits, but on smoother trails it does a great job of muting out buzz and keeping you comfortable.

While this bike is passable for descending, the race geometry and nimble aluminum frame really shine on the uphills. It isn’t super light, which is to be expected for the price, but still is quite lightweight for an entry-level bike. When you hit steep climbs, you’ll find yourself impressed at how eagerly this bike pedals up and over obstacles.

The aluminum frame is lightweight, stiff, and does a great job at getting your power down to the ground. If you’re coming from a heavier, older mountain bike, you’ll definitely

Trek X-Caliber 6 Frame and Geometry

The Trek X-Caliber 6 is built around a nimble aluminum frame with mechanically formed butted tubing. This frame is plenty stiff and strong for most trail riding, and the light weight will help you out on the uphills.

For an inexpensive entry-level bike, this frame has a surprising amount of modern features. Internal front derailleur routing keeps it looking clean and streamlined. Race geometry makes it feel quick and maneuverable. It even has size-specific wheel clearance, with 27.5-inch wheels for XS and S, and 29-inch wheels for size M and above.

Specs and Components

With budget mountain bikes, it’s always a balancing act for manufacturers to spec components that perform well enough while still hitting a price point. Overall, I think Trek did a good job with the X-Caliber 6.

Here are some of the component highlights to give you an idea of the build spec.

The X-Caliber 6 comes equipped with a Sram X4 with an 11-34 cassette in the back and 44/32/22 chainrings.

This is definitely not the most advanced or modern drivetrain available, but it’s pretty on-par with what you should expect from an entry-level bike from 2015. If you are looking for an up-to-date bike, there are 1x drivetrains available in the same MSRP price range, but for an older bike, this is a decent drivetrain.

One benefit of the 3x9 setup is that you get more gear range than comparable 1x drivetrains. The low-end climbing gears aren’t as low as I’d like, but the 44-tooth high end chainring gives you great high gears for speed. This is especially nice if you’ll use this bike for pavement riding and commuting.

This bike is a hardtail, so you have no rear suspension here. For the type of riding this bike is designed for, that can actually be considered an advantage. Hardtails are naturally more efficient and better at putting your power down for climbing and pedaling.

On the front end you get a 100 mm travel Suntour SR XCM fork. This is definitely a budget fork, but it offers decent performance for most riding. As a coil spring fork, it will be significantly heavier than air-sprung forks, but that’s what you can expect from a bike at this price.

Overall, I think you’ll be pleased with the performance of this fork. It is relatively smooth, and the travel helps even out rough sections of trails.

Brakes are a common place for manufacturers to cut corners on budget bikes. It’s nice to see that the X-Caliber 6 comes with Shimano hydraulic disc brakes. If you are coming from mechanical brakes, you’ll be impressed by the awesome stopping power from these Shimano M355 brakes.

Many similar bikes come with cheaper mechanical disc brakes, so this is definitely a highlight of this build.

Wheels and Tires

The wheels on this bike are pretty standard Bontrager alloy rims and hubs. On size XS and S, you get 27.5-inch wheels, while size M and above come with 29-inch hoops.

These wheels come fitted with Bontrager XR1 tires. These are fast-rolling tires designed to emphasize efficiency and light weight over maximum grip. They still have decent side knobs for superior corner traction.

I wouldn’t count on these tires for ultimate grip in loose conditions, but they do a good enough job for most packed singletrack riding.

Competition for the Trek X-Caliber 6

The X-Caliber 6 fits into a crowded budget-mountain bike market. There are a lot of other options to choose from, so it’s important to know how it measures up to the competition.

The most important thing to note is that the Trek X-Caliber 6 was discontinued in 2015, replaced by the Marlin 6, so you won’t be able to find an X-Caliber for sale again. This will make a difference with the bikes we’re comparing it with, because they are newer and currently available for sale.

Trek X-Caliber 6 vs Trek Marlin 6

If you’re wanting to get a bike that’s similar to the X-Caliber 6 but in a more modern, updated package, the Trek Marlin 6 is the bike that replaced the X-Caliber 6 in Trek’s lineup.

These bikes share a lot of the same DNA with lightweight aluminum frames and cross country race-inspired geometry. They have similar spec’d forks, and brakes as well.

The biggest difference will appear in the drivetrain. While the X-Caliber 6 used an old-school 3x9 drivetrain, the Marlin 6 has a more modern setup with a Shimano Deore 1x10 speed drivetrain.

It really will come down to personal preference, but 1x10 drivetrains are the new industry standard for mountain bikes. If you are okay with older technology and design, you can probably find an X-Caliber used for a much lower price.

Trek X-Caliber 6 vs Giant Talon 2

Giant is one of the most popular brands in the mountain biking world, and for good reason. Their business model enables them to offer seriously capable bikes at much lower prices than competitors.

The Giant Talon 2 competes directly with the X-Caliber 6 (or Marlin 6, nowadays) in the entry-level hardtail market, and there are a lot of similarities in geometry and components.

Again, the biggest difference is going to be the drivetrain. The Giant Talon 2 uses a Microshift Advent 1x9 setup compared to the X-Caliber’s 3x10. While this drivetrain doesn’t get as much publicity as products from Sram or Shimano, I’ve been very impressed with the Microshift Advent lineup.

This drivetrain is designed to be affordable, reliable, and durable. It offers the same gear range as Shimano’s 10-speed Deore, but with a thicker 9-speed chain and simplified adjustments.

With more aggressive geometry and sensible component selection, I think the Giant Talon 2 is definitely worth looking at if you are in the market for an entry-level bike.

Trek X-Caliber 6 vs Cannondale Trail 7

The Cannondale Trail 7 is another popular bike that slots into a similar price bracket. As with most bikes in this market range, there are a lot of things that are similar, with just the small details making the difference.

This bike has basic hydraulic disc brakes, as coil-spring fork, and internal cable routing like the others compared here.

The Cannondale Trail 7 is a little behind the times with 2x8 shifting. Even the older X-Caliber gives you more range and better gear spacing with its 3x9 setup.

Overall, if you are looking for a budget hardtail bike, I think you’ll be better off with the Trek X-Caliber 6 than the Cannondale Trail 7.

Where to Buy the Trek X-Caliber 6

Unfortunately the Trek X-Caliber 6 is out of production and is no longer available to buy new. That said, it’s definitely worth looking around for a used one. Bicycle Blue Book estimates the value of a 2016 X-Caliber 6 at under $250, so you can get a great bike for not much money.

If you are looking to buy the modern successor of the X-Caliber 6, here are places you can find the Trek Marlin 6 for sale:

• Direct from Trek
• Two Brother’s Bike Co

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About THE AUTHOR

Jakob Thygerson

I love mountain biking and live in Salt Lake City: a central hub for the MTB community. I started biking four years ago when a series of injuries put me out of commission for trail running. While biking started as cross-training, I fell in love with the sport. I mainly enjoy using my bike as a tool for exploration, I've done 50-mile all-day epic rides in the mountains and have been to some amazing places on my bike.

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Trek Procaliber 6 review

Can this ‘scissor’ frame cut fatigue and add speed?

Mick Kirkman

Guy Kesteven

Stiff, accurate frame; dropper and bigger-tyre friendly; Judy fork and Eagle gears; shock-shrugging IsoSpeed

IsoSpeed takes a wallop to start moving and then a while to stop; backswept bar and seat tube won’t suit all; surprisingly slow tyres

Trek introduced its unique ‘IsoSpeed’ frame technology to its alloy MTBs last year, and the Procal 6 adds 12-speed SRAM Eagle shifting and RockShox’s impressive new Judy fork to the mix.

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Trek Procaliber 6 frame

The IsoSpeed system uses a small pivot to ‘decouple’ the seat tube and top tube, allowing them to articulate back and forwards independently. The bottom of the dramatically offset asymmetric seat tube is also almost completely flattened to form a leaf spring segment, to help soften blows from the trail.

Other distinctive frame details include the ‘waist’ on the head tube and the extensively shaped and tapered top tube.

There’s a cable port for a Shimano side-swing front mech in case you want to swap the single chainring for a double, plus two mounting stubs that’ll also work for a chain guide.

A seat-tube exit hole and ‘spare’ internal down-tube routing allow you to upgrade to a stealth dropper, and the 31.6mm seat tube diameter gives you a full choice of posts, compared to the limited options available in 27.2mm.

You get mounts for two bottle-cages too. The rear stays have no braces, to give max mud clearance. They end at neat Boost-width dropouts for a through-axle (with a QR lever on the end, for tool-free wheel removal/insertion), with a brake mount that bridges between the stays.

Trek Procaliber 6 kit

Despite its complex frame and low price, the Procal 6 has a good spec. The Judy Gold is smooth, well-controlled and relatively light, thanks to its full-alloy construction.

It has a through-axle for accurate tracking and a shifter-style ‘OneLoc’ remote lockout. The only downside is the plastic ‘flag’ adjuster that makes rebound adjustment crude.

Drive is provided by a full SRAM NX Eagle set-up, with an oversized DUB axle rotating in broad-spaced press-fit bearings, which maximise stiffness but can be a pain to service.

The XG-1230 cassette is heavy in weight and feel compared to Shimano, but the shifting through the 11-50t gear range is simplicity itself and gives great drive efficiency.

Brakes are the basic but utterly dependable Shimano MT400s. The rest of the kit is Bontrager, including the distinctively backswept bar.

Trek Procaliber 6 ride

That bar makes a huge difference. By sweeping your hands further back, it mimics the effect of a shorter stem, so the 90mm unit feels more like 60-70mm.

As a result, the Trek feels twitchier and lighter, and there’s less weight on the front tyre. That’s compounded by an unusually slack seat tube, which also shifts your weight backward. This is handy for popping the wheel up over obstacles or off drops, but makes the front end more ‘fussy’ in terms of wandering about and losing the line, particularly on climbs.

As for the IsoSpeed system, it definitely, visibly works. If you hit a big lump, the seat tube bulges forward and the post sways back to help you ride out the blow. That’s useful if you get caught in the saddle by a big wallop, but most of the time you’ll be up and on the pedals anyway.

The shock-absorbing advantage while you’re powering a seated gear is also tempered by obvious rebound bounce, which can continue distractingly long after the initial impact. It takes a lot to get it moving too.

Bontrager’s X2 tyres are slower and less forgiving than their looks suggest — the ride was noticeably quicker and smoother when I swapped in the Chisel’s wheels.

The Trek still gets power down firmly though, without being as bruising as the Cube, and the accurate-tracking frame and quality fork mean you can drive the front end hard, once you’re used to the bar. Dropper compatibility and the ability to fit fatter tyres give the Procal 6 more aggressive-terrain potential too.

Trek Procaliber 6 specifications and geometry

• Sizes (*tested): 13.5, 15.5, 17.5, 18.5, 19.5*, 21.5, 23in
• Weight: 12.42kg
• Frame: ‘Alpha Platinum’ aluminium alloy
• Fork: RockShox Judy Gold RL Solo Air w/ OneLoc remote, 100mm (3.9in) travel
• Chainset: SRAM NX Eagle DUB, 30t
• Bottom bracket: SRAM DUB PF92
• Cassette: SRAM XG-1230, 11-50t
• Chain: SRAM NX Eagle
• Mech: SRAM NX Eagle
• Shifters: SRAM NX Eagle (1x12)
• Hubs: Bontrager
• Axles: 15x110 Boost (f), 12x148mm Boost (r)
• Rims: Bontrager Kovee
• Spokes: 28 stainless
• Tyres: Bontrager XR2 Team Issue 29x2.2in (54mm measured)
• Wheel weight: 1.97kg (f), 2.83kg (r), inc tyres
• Stem: Bontrager Elite, 90mm
• Bar: Bontrager Comp, 720mm
• Grips: Bontrager XR Trail Comp
• Headset: FSA IS-2
• Saddle: Bontrager Arvada
• Seatpost: Bontrager rigid
• Brakes: Shimano MT400, 180/160mm rotors

Trek Procaliber 6 geometry

• Seat angle: 72°
• Head angle: 69.5°
• Chainstay: 43.5cm / 17.13"
• Seat tube: 47cm / 18.5"
• Top tube: 64cm / 25.2"
• Head tube: 10cm / 3.94"
• Fork offset: 5.1cm / 2.01"
• Trail: 8.3cm / 3.27"
• Bottom-bracket drop: 5.8cm / 2.28"
• Bottom-bracket height: 31cm / 12.2"
• Wheelbase: 113cm / 44.49"
• Stack: 60.4cm / 23.78"
• Reach: 44cm / 17.32"

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Trek X-Caliber 8

• AUS $ NZD $ USD $ CAD $ GBP £ EUR €

Weight / M - 13.43 kg / 29.6 lbs (with tubes)

At a glance

X-Caliber 8 is a cross country mountain bike made for fast laps and long days on the trail. It’s built with special attention to value and the parts that make the biggest difference in performance. A Shimano drivetrain, RockShox fork, and hydraulic disc brakes make it a great choice for new mountain bikers and XC racers searching for fast, fun, singletrack adventure.

Where To Buy

Specifications

• Frame Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141, G2 Geometry
• Fork RockShox 30 Silver, Solo Air, rebound adjust, TurnKey hydraulic lockout, tapered steerer, G2 Geometry w/51mm offset on 29ers, 100mm travel (13.5: 80mm travel)
• Wheels Bontrager Kovee 28-hole Tubeless Ready, tubeless rim strips and valves sold separately
• Wheel Size 29" 27.5"
• Tires Bontrager XR2, 29x2.20˝ (13.5 & 15.5: 27.5x2.20˝)
• Chain KMC X10
• Crank Race Face Ride, 36/22
• Shifters Shimano Deore M6000, 10 speed
• Brakeset Shimano MT200 hydraulic disc
• Handlebar Bontrager alloy, 31.8mm, 5mm rise, 720mm width (13.5: 690mm width)
• Saddle Bontrager Arvada
• Seatpost Bontrager alloy, 2-bolt head, 31.6mm, 12mm offset
• Stem Bontrager Elite, 31.8mm, 7 degree, Blendr compatible
• Grips Bontrager XR Trail Comp, nylon lock-on
• Headset Semi-integrated, cartridge, 1-1/8˝ top, 1.5˝ bottom

Q: Where to buy a 2019 Trek X-Caliber 8?

The 2019 Trek X-Caliber 8 may be purchased directly from Trek .

Q: How much does a 2019 Trek X-Caliber 8 weigh?

A 2019 Trek X-Caliber 8 weights M - 13.43 kg / 29.6 lbs (with tubes).

Q: What size wheels does the 2019 Trek X-Caliber 8 have?

The 2019 Trek X-Caliber 8 has 29" and 27.5" wheels.

Q: What size 2019 Trek X-Caliber 8 should I get?

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Trek X-Caliber 9 2019

About the Trek X-Caliber 9 2019

The Trek X-Caliber 9 2019 is a Hardtail Cross Country Mountain Bike with a alloy frame. Equipped with a Shimano XT drivetrain of 22 gears (2x11). Its features include internal routing, boost 110 , and hydraulic disc brakes. The bike weighs approximately 13,15 kg.

Internal routing

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Cosmoscow 2019 Fair's Programme Highlights

The best of the international and Russian art worlds are coming to Cosmoscow 2019 .

The Fair will take place from September 6 to 8 with Privilege and VIP Preview on September 5 .

Cosmoscow International Contemporary Art Fair  announces the highlights of this year’s commercial and not-for-profit programmes. The seventh Cosmoscow Fair is taking place at Moscow’s Gostiny Dvor on September 6–8 with the Privilege and VIP Preview on September 5, supported by its long-standing partners: Main Partner  Qatar Airways , Strategic Partner  Credit Suisse , Automobile Partner  Audi , Official Partner Ruinart,  Jewelry partner  Mercury , Beauty partner  La Prairie  and Official Hotel  St. Regis Moscow Nikolskaya.

Cosmoscow 2019 will welcome more than 60 galleries from Russia and around the world, including art market powerhouses such as long-time influencers in Giorgio Persano (IT), Galerie Frank Elbaz (FR), and Georg Kargl Fine Arts Gallery (AT); alongside a more recent generation of players in Emanuel Layr (AT/IT); Peres Projects Gallery (DE), and Temnikova & Kasela (EE).

Margarita Pushkina, Founding Director of Cosmoscow International Contemporary Art Fair and Founder of Cosmoscow Foundation for Contemporary Art , said:  “This year, we are happy to welcome an impressive number of high-caliber international participants. This proves that our strong belief and investment in the development of the Fair as an international platform are paying off. We are encouraged by the continued support of our long-standing and new partners. It is gratifying to note that the circle of like-minded people and institutions united around Cosmoscow grows with each passing year. We are pleased to announce that starting this year, purchases benefiting museum collections will be made at the Fair. All of this creates a synergy effect that is crucial for Cosmoscow mission of building and developing the contemporary art market in Russia, promoting Russian artists in a global context.” 

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2019 Trek X-Caliber 8

A 27.5″ / 29″ aluminum frame hardtail crosscountry bike with upper mid-range components. Compare the full range

For This Bike

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Based on frame geometry and build specs.

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

X-Caliber 8

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Trek's budget-friendly hardtails have evolved on two distinct paths, an affordable XC steed and a fun trail machine. Born out of the same frame, find out how these two bikes compare. - Mtbr.com

Read Review

If you're looking for a rapid handling cross-country hardtail then the X-Caliber delivers in spades, but it's a bit of a handful when the trail turns downhill thanks to steep geometry and a dated cockpit. Buyer's guide to mountain bikes - get the best MTB for you The best mountain bikes for under £1,000 - the best budget buys ridden and rated Trek launch updated 2020 X-Caliber aluminium hardtail cross-country bike The X-Caliber range is Trek's entry to their proper cross-country hardtail offerings, designed to tackle proper off-road riding rather than being a multi-sport machine.

Jul 2016 · Alan Muldoon

The Trek looks amazing and has a decent spec, it’s just a shame the frame isn’t more trail-focused

Quality frame and spec

Fork is under sprung for frame size

Last updated September 16 Not listed for 1,664 days

• X-Caliber 9

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