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2018

Procal AL Frameset

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$1,069.99 Model 21920
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.
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.
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The smarter hardtail

Procaliber sets the bar for hardtail speed and smarts. It's the fast, ultralight cross country ride that rules the singletrack, from the local race scene to the World Cup XC.

Procaliber's innovative IsoSpeed decoupler delivers uncompromising XC performance, efficiency, and an incredible ride feel. It's the fastest, smoothest, smartest hardtail on the trail.

Product details

  • IsoSpeed is a real advantage, and you can't find it in any other hardtail family
  • The sleek internal cable routing gives you clean looks and protects your cables
  • This Alpha Platinum Aluminum frame is race-light and trail-tough

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Features

Specifications

  • Frameset

    Frame
    Alpha Platinum Aluminum, IsoSpeed, tapered head tube, internal derailleur routing, balanced post mount brake, PF92, Boost148, G2 Geometry on 29ers
  • Drivetrain

    Bottom bracket
    PF92
  • Components

    Headset
    FSA IS-2, 1-1/8˝ top, 1.5˝ bottom
  • Weight

    Weight
    17.5" - 2.00 kg / 4.40 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

All measurements provided in cm unless otherwise noted.

Frame size number Wheel size A Seat tube B Seat tube angle Effective seat tube angle C Head tube length D Head angle E Effective top tube F Bottom bracket height G Bottom bracket drop H Chainstay length I Offset J Trail K Wheelbase L Standover M Frame reach N Frame stack Frame rise
13.5 in 27.5" 34.3 73.0° 73.0° 10.0 69.0° 54.5 30.2 4.8 42.5 4.4 8.7 103.7 69.2 37.0 56.3 56.3
15.5 in 27.5" 36.8 73.0° 73.0° 10.0 69.3° 56.4 30.2 4.8 42.5 4.4 8.5 105.3 71.0 38.2 58.3 56.3
17.5 in 29" 41.9 72.5° 72.5° 9.0 69.5° 59.9 31.1 5.8 43.5 5.1 8.3 109.8 74.6 41.2 59.5 59.5
18.5 in 29" 44.4 72.3° 72.3° 9.0 69.5° 61.7 31.1 5.8 43.5 5.1 8.3 111.3 75.9 42.7 59.5 59.5
19.5 in 29" 47.0 72.0° 72.0° 10.0 69.5° 63.8 31.1 5.8 43.5 5.1 8.3 113.2 77.7 44.2 60.4 60.4
21.5 in 29" 52.1 72.0° 72.0° 12.0 69.5° 65.9 31.1 5.8 43.5 5.1 8.3 115.4 81.2 45.7 62.8 62.8
23 in 29" 55.9 72.0° 72.0° 12.0 69.6° 67.3 31.1 5.8 43.5 5.1 8.3 116.6 83.8 47.1 63..2 63..2

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