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Trek Domane AL 4 Disc Road Bike 2021

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Domane AL 4 Disc Road Bike 2021

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Product ID: 1237019

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Trek Domane AL 4 Disc Road Bike 2021

With the Trek Domane AL 4 Disc Road Bike you get the best of both - comfort and speed. It uses an Endurance Geometry so you can ride hour after hour without aches and pains, and it makes an extremely versatile all-rounder for long rides and training thanks to the combination of an alloy frame, carbon fork, reliable components and clearance for wider 38mm tyres. Key to the bump-smoothing comfort is the carbon fork featuring IsoSpeed technology, soaking up impact and taking the harshness out of the poorest roads and even gravel surfaces.

A Shimano Tiagra 10-speed groupset hits the middle ground between performance and reliability and the compact chainset and wide-ranging 10-32 cassette brings plenty of range for steep hills and fast descents alike. Hydraulic disc brakes are confidence-inspiring, as effective in wet conditions as they are in the dry, so you'll always be able to stop fast when required. The combination of Bontrager wheels and tyres can be set up tubeless if you wish to benefit from even smoother rolling plus better protection against punctures.


  • Trek 100 Series Alpha Aluminium frame with hidden cables
  • The unique IsoSpeed Carbon fork, which swoops forward toward the dropouts, absorbs vibrations from the road so your arms won't fatigue as quickly
  • Endurance Geometry
  • Setting your wheels up as tubeless reduces the overall weight of your bike and the chance you’ll get a flat
  • Bigger tyre clearance (up to 38c) lets you run wider tyres for more traction and stability on trails and other light gravel roads
  • DuoTrap S compatibility makes it easy to wirelessly track your rides, so you can set goals and watch yourself reach them
  • Shimano Tiagra 10-speed compact drivetrain
  • Shimano Tiagra hydraulic disc brakes

Technical Specification

Frame Trek 100 Series Alpha Aluminium, tapered head tube, internal routing, mudguard mounts, DuoTrap S compatible, flat mount disc, 142x12 thru-axle
Fork Trek Domane AL carbon, tapered alloy steerer, internal brake routing, mudguard mounts, flat mount disc, 12x100mm thru-axle
Headset FSA Integrated, sealed cartridge bearing, 1-1/8" top, 1.5" bottom
Bottom Bracket Shimano RS500, 68mm, threaded external
Stem Bontrager Elite, 31.8mm, Blendr compatible, 7-degree
Handlebar Bontrager Comp VR-C, alloy 31.8mm, 100mm reach, 124mm drop
Bar Tape Bontrager Supertack Perf
Front Brake Shimano Tiagra hydraulic disc
Rear Brake Shimano Tiagra hydraulic disc
Brake Levers Shimano Tiagra R4725
Front Derailleur Shimano Tiagra 4700, 31.8mm clamp
Rear Derailleur Shimano Tiagra 4700, long cage, 34T maximum cog, 10-speed
Shift Levers Shimano Tiagra R4725, 10-speed
Chain Shimano Tiagra HG54, 10-speed
Cassette Shimano HG500, 11-32, 10-speed
Crankset Shimano Tiagra 4700, 50/34 (compact)
Front Wheel Formula RX-512 alloy, 6-bolt, 100x12mm thru-axle hub / Bontrager Affinity Disc, tubeless-ready, 24-hole, 21mm width, Presta valve rim
Rear Wheel Formula RX-142 alloy, 6-bolt, Shimano 11-speed freehub, 142x12mm thru-axle / Bontrager Affinity Disc, tubeless-ready, 24-hole, 21mm width, Presta valve rim
Front Tyre Bontrager R1 Hard-Case Lite, wire bead, 60 TPI, 700x32c, clincher
Rear Tyre Bontrager R1 Hard-Case Lite, wire bead, 60 TPI, 700x32c, clincher
Saddle Bontrager P3 Verse, steel rails, 145mm width
Seatpost Bontrager alloy, 27.2mm, 8mm offset
Pedals Available to be purchased separately
Manufacturer Claimed Weight 10.48kg / 22.55lbs (size 56)

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride.

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.

If you require any assistance please contact our Customer Care team.

Trek Domane AL 4 Disc Road Bike 2021 Sizing

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