Trek X-Caliber 4: A black and blue Trek mountain bike is displayed in a bike shop, with a light green t-shirt featuring a bicycle graphic hanging behind it. To the side, there is a green cycling jersey and various cycling gloves on racks. The store has a variety of biking apparel and accessories in the background.
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Product info

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2 Singletracks members own this.
MSRP: $550
#151 out of 518 29er bikes
Brand: Trek
Details /







Colors



Trek Black/True Blue



Viper Red/Trek Black

Frameset



Frame



Alpha Gold Aluminum w/semi-integrated head tube, mechanically formed & butted tubing, race geometry, internal front derailleur routing, G2 Geometry



Front suspension



SR Suntour M-3030 w/coil spring, preload, 75mm travel



Sizes



14.5, 15.5, 17.5, 18.5, 19.5, 21.5, 23"

Wheels



Wheels



Formula DC20 alloy front hub; Formula DC22 alloy rear hub w/Bontrager AT-550 36-hole rims



Tires



Bontrager XR1, 29x2.20" front, 29x2.0" rear

Drivetrain



Shifters



Shimano Altus EF51, 8 speed



Front derailleur



Shimano Altus



Rear derailleur



Shimano Altus M280



Crank



Shimano M131, 42/34/24



Cassette



Shimano HG31 11-34, 8 speed



Pedals



Wellgo nylon platform



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Rider questions

Q: Looking for recommendations for upgrades in order of importance. I have had this bike for a few years And need to replace the whole drive train without spending a fortune.

Q: what is alpha gold aluminium