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2019

Checkpoint AL 4

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Model 24971

Checkpoint AL 4 is an ideal entry point to the world of gravel riding. It's built with a lightweight aluminium frame and a durable parts group that won't quit on you as your skills advance. Plus, this gravel bike has exceptional versatility. Extra mounts make it easy to add bags and racks for daily commutes and touring.

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It's right for you if...

Your idea of the perfect ride includes chasing the sunlight through a car-free landscape on a long dirt road. You ride for the experience of it, but you also need your bike to have the versatility to take on city commutes and daily around-town rides.

The tech you get

A 200 Series Alpha Aluminium frame with massive tyre clearance, a carbon disc fork, 12 mm thru axles, a 2x10 Shimano Tiagra drivetrain, mudguard and rack mounts, Shimano hydraulic disc brakes for all-weather stopping power, Tubeless Ready wheels, and 700x32 Bontrager R1 Hard-Case Lite tyres.

The final word

If you're looking for adventure off the beaten path without breaking the bank, Checkpoint AL 4 is a great choice. This value-minded ride is built for epic gravel rides, but it's equally at home on city streets, your daily commute and more!

favorite_borderWhy you'll love it

  1. This bike is exceedingly versatile and suited to a wide variety of riding styles, including gravel rides, bikepacking and daily commutes
  2. Massive tyre clearance means you can use tyres up to 38c for extra traction and stability in any condition
  3. Mounts on the seat tube and both sides of the down tube make it easy to carry extra gear and water
  4. Internal routing protects your cables, even when the gravel gets muddy


Features

Specifications

  • Frameset

    Frame
    Alpha 200 series aluminium, tapered head-tube, flat-mount disc brakes, 12mm thru-axle, internal cable routing, w/rack mounts and hidden fender mounts
    Fork
    Checkpoint carbon disc, tapered steerer, flat-mount disc brakes, rack mounts, hidden mudguard mounts, 12 mm thru-axle
  • Wheels

    Front hub
    Formula alloy disc, 12 mm thru-axle, 24h
    Rear hub
    Formula alloy disc, 12 mm thru-axle, 24h
    Rims
    Bontrager Affinity, Tubeless Ready, 24h
    Tyres
    Bontrager R1 Hard-Case Lite, 700x32c
    Max tyre size
    38c Bontrager tyres (with at least 4 mm of clearance to frame)
  • Drivetrain

    Shifters
    Shimano Tiagra, 10-speed
    Front derailleur
    Shimano Tiagra
    Rear derailleur
    Shimano Tiagra
    Crank
    Shimano Tiagra, 50/34 (compact)
    Bottom bracket
    Sealed cartridge
    Cassette
    Shimano Tiagra, 11-32, 10-speed
    Chain
    Shimano Tiagra
    Pedals
    Not included
  • Components

    Saddle
    Bontrager Arvada Comp, steel rails
    Seatpost
    Bontrager-Approved, alloy, 27.2 mm
    Handlebar
    Bontrager Comp VR-C, 31.8 mm
    Grips
    Bontrager tape
    Stem
    Bontrager Elite, 31.8 mm, 7-degree, w/computer and light mounts
    Head set
    Integrated, cartridge bearing, sealed, 1-1/8˝ top, 1.5˝ bottom
    Brake set
    Shimano RS405 flat-mount hydraulic disc  
  • Weight

    Weight
    56cm – 10.56 kg/23.28 lbs
    Weight limit
    This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb).
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 on Trek pre-production painted frames at the time of publication. Weights may vary in final production.

Sizing & fit

Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise stated.

Frame size number A — Seat tube B — 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
44 cm 39.0 75.5° 9.0 70.6° 50.5 27.5 8.0 43.0 50 7.2 100.2 68.5 36.8 53.1
49 cm 44.0 75.0° 10.0 71.4° 51.8 27.7 7.8 43.0 50.0 6.6 100.5 72.3 37.3 54.1
52 cm 47.5 74.0° 12.0 71.7° 53.7 27.7 7.8 43.0 50.0 64.6 101.1 75.5 37.6 56.1
54 cm 50.0 73.5° 13.5 71.8° 54.8 27.9 7.6 43.0 50.0 6.4 101.8 77.5 37.8 57.4
56 cm 52.5 73.0° 15 72.2° 56.0 27.9 7.6 43.0 50.0 6.1 102.1 79.4 38.0 59.0
58 cm 54.8 73.0° 17.0 72.3° 56.8 28.1 7.4 43.0 50.0 6.1 102.8 81.6 38.2 60.7
61 cm 56.7 73.0° 20.0 72.6° 58.1 28.1 7.4 43.0 50.0 5.9 103.9 83.7 38.6 63.7

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