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It's right for you if...
You're a value-minded rider looking for a lightweight race bike with the added versatility and performance of disc brakes. You expect a lot of performance for your money and want a quality ride you won't immediately outgrow.
The tech you get
A lightweight 300 Series Alpha Aluminium frame with shaped tubes and Invisible Weld Technology for the looks and handling of a far more expensive carbon bike, a 2x10 Shimano Tiagra drivetrain, Émonda carbon fork, Bontrager Affinity tubeless-ready wheels, powerful flat-mount hydraulic disc brakes, and internal cable routing in both the frame and fork.
The final word
Émonda ALR 4 Disc is the most affordable road disc model in the line-up, but it handles like a far more expensive bike and has the looks to match. It's an extremely capable racing bike at a great price.
The Walkthrough
favorite_borderWhy you'll love it
- Carbon looks and handling, alloy price point: Invisible Weld Technology and shaped tubes for sleek looks, light weight and incredible handling
- It climbs fast, corners on rails, and descends with confidence
- Disc brakes offer better braking performance and extra clearance for wider, more stable tyres
- Proven H2 geometry gives you a ride quality that stands up in every way to far more expensive carbon bikes
- Internal cable routing extends the life of your cables and adds to the bike's sleek look
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Features
Invisible weld technology
Revolutionary welding technology creates a better connection with each tube junction, increasing strength while using less material.
Blendr-compatible stem
Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks and maximum user friendliness.
Learn more
H2 fit
H2 is the optimal fit to put most riders, including many of our Pro Team athletes, in the right position for power and performance.
300 Series Alpha Aluminium
Trek’s premium-grade aluminium is hydroformed into size-specific tubes that provide the perfect balance of stiffness and weight.
Learn more
Flat Mount disc brakes
All-new Flat Mount disc brakes are more elegant, lighter, smaller and cleaner than traditional disc brakes, providing superior performance and stopping power under harsh conditions.
Specifications
*spec applies to all sizes unless otherwise noted
| Frame | Ultralight 300 Series Alpha Aluminium, Invisible Weld technology, tapered head tube, Control Freak internal routing, DuoTrap S compatible, direct-mount rim brakes, 130x5 mm QR, 86.5 mm PressFit bottom bracket |
|---|---|
| Frame fit | H2 |
| Hub front | Bontrager alloy, sealed bearing, CenterLock disc, 100x12 mm thru axle |
|---|---|
| Hub rear | Bontrager alloy, sealed bearing, CenterLock disc, Shimano 11-speed freehub, 142x12 mm thru axle |
| Rim | Bontrager Affinity Disc, Tubeless Ready, 24-hole, 21 mm width, Presta valve |
| Max tyre size | 28c Bontrager tires (with at least 4mm of clearance to frame) |
| Front derailleur | Shimano Tiagra 4700, braze-on |
|---|---|
| Rear derailleur | Shimano Tiagra 4700, long cage, 34T max cog |
| *Crank |
Size:
47, 50, 52 Shimano Tiagra 4700, 50/34, 170 mm length |
|
Size:
54, 56 Shimano Tiagra 4700, 50/34, 172.5 mm length |
|
|
Size:
58, 60, 62, 64 Shimano Tiagra 4700, 50/34, 175 mm length |
|
| Bottom bracket | Shimano BB71, 86.5 mm, PressFit |
| Cassette | Shimano Tiagra HG500, 12-28, 10-speed |
| Chain | Shimano Tiagra HG54, 10-speed |
| Weight | 56 - 9.33 kg/20.58 lb |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 125 kg (275 lb). |
Sizing & Tech
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 retailer.
Rider Height
Inseam
47
152.0 - 158.0 cm
4'11.8" - 5'2.2"
71.0 - 75.0 cm
28.0" - 29.5"
50
158.0 - 163.0 cm
5'2.2" - 5'4.2"
74.0 - 77.0 cm
29.1" - 30.3"
52
163.0 - 168.0 cm
5'4.2" - 5'6.1"
76.0 - 79.0 cm
29.9" - 31.1"
54
168.0 - 174.0 cm
5'6.1" - 5'8.5"
78.0 - 82.0 cm
30.7" - 32.3"
56
174.0 - 180.0 cm
5'8.5" - 5'10.9"
81.0 - 85.0 cm
31.9" - 33.5"
58
180.0 - 185.0 cm
5'10.9" - 6'0.8"
84.0 - 87.0 cm
33.1" - 34.3"
60
185.0 - 190.0 cm
6'0.8" - 6'2.8"
86.0 - 90.0 cm
33.9" - 35.4"
62
190.0 - 195.0 cm
6'2.8" - 6'4.8"
89.0 - 92.0 cm
35.0" - 36.2"
All measurements provided in cm unless otherwise stated.
| Frame size number | Wheel size | A — Seat tube | B — Seat tube angle | C — Head tube length | D — Head angle | E — Effective top tube | G — Bottom bracket drop | H — Chainstay length | I — Offset | J — Trail | K — Wheelbase | L — Standover | M — Frame reach | N — Frame stack |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 47 cm | 700c | 44.4 | 74.6° | 11.5 | 71.2° | 51.3 | 7.2 | 41.0 | 4.5 | 6.7 | 97.4 | 69.8 | 36.9 | 52.2 |
| 50 cm | 700c | 47.6 | 74.6° | 13.0 | 72.1° | 52.1 | 7.2 | 41.0 | 4.5 | 6.1 | 97.4 | 70.7 | 37.4 | 53.5 |
| 52 cm | 700c | 49.3 | 74.2° | 14.0 | 72.8° | 53.4 | 7.2 | 41.0 | 4.5 | 5.7 | 97.7 | 72.9 | 37.9 | 54.7 |
| 54 cm | 700c | 50.6 | 73.7° | 15.5 | 73.0° | 54.3 | 7.0 | 41.0 | 4.5 | 5.6 | 98.1 | 74.2 | 38.1 | 55.5 |
| 56 cm | 700c | 53.3 | 73.3° | 17.0 | 73.5° | 56.0 | 7.0 | 41.0 | 4.0 | 5.8 | 98.3 | 76.7 | 38.7 | 57.7 |
| 58 cm | 700c | 55.3 | 73.0° | 19.0 | 73.8° | 57.3 | 6.8 | 41.1 | 4.0 | 5.6 | 99.2 | 78.6 | 39.1 | 59.6 |
| 60 cm | 700c | 57.3 | 72.8° | 21.0 | 73.9° | 58.6 | 6.8 | 41.1 | 4.0 | 5.6 | 100.1 | 80.4 | 39.5 | 61.5 |
| 62 cm | 700c | 59.3 | 72.5° | 23.0 | 73.9° | 59.8 | 6.8 | 41.2 | 4.0 | 5.5 | 101.0 | 82.2 | 39.8 | 63.4 |
| 64 cm | 700c | 61.3 | 72.3° | 25.0 | 74.0° | 61.0 | 6.8 | 41.3 | 4.0 | 5.5 | 101.8 | 84.1 | 40.1 | 65.4 |