Alpha Platinum Aluminum, IsoSpeed, tapered head tube, internal derailleur routing, balanced post mount brake, PF92, Boost148, G2 Geometry on 29ers (Sizes XS and XS: 142x12 rear spacing)

Procaliber AL Frameset is a race-worthy cross country mountain bike with the unique advantage of IsoSpeed, a decoupler at the top tube/seat tube junction that provides additional compliance on rough trails. This Alpha Platinum Aluminum frameset is a wallet-friendly start to a lightweight XC build for your fastest singletrack rides ever.

Trek Procaliber AL Frameset

The Trek Procaliber is a standout in the cross-country category, praised for its lightweight carbon frame and innovative IsoSpeed decoupler that enhances ride comfort. It offers sharp handling and efficient performance, though some reviews note limitations in steering precision and component groups. The bike is frequently compared to the Specialized Epic Hardtail and Trek's own Supercaliber for its race-ready features.

MD/LG

This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

MSRP	$1,149
Where to Buy	— $1 At
Category	Crosscountry
Weight	4.4 lbs (frame)

Frame	Aluminum

Wheels
Wheel Size	27.5″




Drivetrain
Brand Site	trekbikes.com
Summary	The Trek Procaliber AL Frameset is a 27.5″ aluminum frame crosscountry frameset.

Frame	Alpha Platinum Aluminum, IsoSpeed, tapered head tube, internal derailleur routing, balanced post mount brake, PF92, Boost148, G2 Geometry on 29ers (Sizes XS and XS: 142x12 rear spacing) BB Standard: BB86/BB92, Press Fit
Bottom Bracket	PF92
Headset	FSA IS-2, 1-1/8˝ top, 1.5˝ bottom