HADRON² Classic 625 Rim Brake
Delivering unprecedented aerodynamic performance with the widest operational range, the HADRON Classic 625 excels in medium to high wind conditions. Designed to deliver maximum speed and thrust, in road racing, time trial and triathlon courses. The HADRON Classic 625 offers incredible all-around performance at an affordable price. UCI approved. Includes lifetime warranty for material and workmanship defects and a Fair-Share-Policy for any other riding damage.
Color options available:
CONFIGURE YOUR WHEELS
All the products
Specs
Weight / Rim | Front Wheel | Rear Wheel | Wheel Set | Aero Profile Height | Max. Rim Width | Brake Track Width |
---|---|---|---|---|---|---|
|
772g | 919g | 1691g | 48.5mm | 25mm | 23mm |
|
795g | 953g | 1748g | 62.5mm | 27mm | 23mm |
|
861g | 1004g | 1865g | 80.0mm | 28mm | 23mm |
Description
Compatibility
Shimano, SRAM 10&11 speed cassettes (standard). XDR Driver & Campagnolo compatible with freehub kits available separately.
Hub
DT Swiss 370 Classic, custom for Swiss Side. Rim brake wheel hub/axle dimensions are: 5mm x 100mm QR front / 5mm x 130mm QR rear.
Disc Brake Interface: Disc Center Lock; Axle System as delivered: 12 x 100mm thru axle front; 12 x 142mm thru axle rear; Disc brake wheel hubs are also supplied with interchangeable end caps for the following axle configurations: 5mm x 100mm QR front axle; 5mm x 135mm QR rear axle
Spokes
DT Swiss Aero Comp J-bend spokes with DT Swiss pro lock hidden aluminium nipples.
Front Rim Brake (radial pattern): 16 spokes (20 spokes for 485).
Rear Rim Brake (2:1 pattern): 21 spokes (24 spokes for 485)
Front Disc Brake (2-cross pattern): 24 spokes.
Rear Disc Brake (2-cross pattern): 24 spokes.
Bearings
- High end stainless steel bearings
- Low friction thanks to single sided seals
- 2080 N load capacity per bearing
- Minimal bearing clearance
Additional Info
Shipping
Package Includes
Tubeless ready rim tape (pre-installed), Valve extension, Tubeless valve, QR skewers, Brake pads (SwissStop Black Prince Flash EVO)
Tyre Size
Rider Weight / Safety Notice
The maximum total system weight (bike + rider) for the HADRON Classic rim brake wheelset is 105kg (HADRON Ultimate rim brake is 100kg). Tyre pressures of 120psi should not be exceeded.
User Manual
Wheel Spec Comparison
Profile Depth
Aero Drag
Aero Wind Stability
Weight
Stiffness
Drag Deltas for Wheel Combinations
Wind Tunnel Data measured on Canyon Speedmax CF SLX at 45km/h
Wheel Setup Front / Rear | Drag (W) | Difference* (W) |
---|---|---|
800 / DISC | 57.10 | -1.80 |
800 / 800 | 59.90 | 0.00 |
625 / 800 | 60.95 | 1.05 |
625 / 625 | 62.00 | 2.10 |
500 / 625 | 63.05 | 3.15 |
500 / 500 | 64.10 | 4.20 |
*Drag difference relative to the 'aero setup' - 800 / 800 |
PERFORMANCE DELTAS FOR WHEEL COMBINATIONS
Wind Tunnel Data measured on 2018 model Canyon Speedmax CF SLX at 45km/h
Wheel Setup Front / Rear | Drag (W) | DIFFERENCE (W) | STEERING MOMENT (Nm) | DIFFERENCE (%) |
---|---|---|---|---|
800/DISC | 57.10 | -1.80 | 1.29 | 0% |
800/800 | 58.90 | 0.00 | 1.29 | 0% |
625/800 | 60.00 | 1.10 | 0.97 | -25% |
625/625 | 60.20 | 1.30 | 0.97 | -25% |
500/800 | 61.70 | 2.80 | 0.71 | -45% |
500/625 | 62.10 | 3.20 | 0.71 | -45% |
500/500 | 62.70 | 3.80 | 0.71 | -45% |
*Performance difference relative to the 'aero setup' - 800 / 800 |
Aero Performance Chart

Wind Stability Chart

Time Benefits
Speed | Power | Drag Reduction | 40km | 90km | 180km | |
---|---|---|---|---|---|---|
|
45km/h 35km/h |
350W 180W |
10.6W 5W |
0m 36s
0m 45s |
1m 21s
1m 40s |
2m 42s
3m 20s |
|
45km/h 35km/h |
350W 180W |
12.7W 6W |
0m 43s
0m 54s |
1m 37s
2m 01s |
3m 14s
4m 02s |
|
45km/h 35km/h |
350W 180W |
14.8W 7W |
0m 55s
1m 08s |
1m 54s
2m 21s |
3m 34s
4m 38s |
*Drag reduction given relative to standard road wheel set. |
Wheel Mapping
Tyre of Riding | Time Trial | Road Racing | Training | Alps |
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Product Reviews

HADRON² Ultimate 625 Disc Brake - Bikeradar Review (Aug. 2021)
Robin Wilmott technical writer of Bikeradar tested the HADRON² Ultimate 625 wheel set for disc brake. Read entire review: HADRON² Ultimate 625 review on bikeradar.com (in English).
Verdict:
- Fast and impressively stable wheels!
August 27, 2021
Robin Wilmott technical writer of Bikeradar tested the HADRON² Ultimate 625 wheel set for disc brake. Read entire review: HADRON² Ultimate 625 review on bikeradar.com (in English).
Verdict:
- Fast and impressively stable wheels!

HADRON² Ultimate 625 Disc Brake - road.cc Review (January 2021)
road.cc website describes Swiss Side’s Hadron2 Ultimate 625 Disc as "the best bang-for-buck upgrade you can get" in its detailed review. They take a close look at the wheelset – from stability to tubeless setup to freehubs.
Their verdict: “Seriously impressive aerodynamic wheelset that delivers real-world speed and stiffness.”
The Hadron2 Ultimate 625 Disc wheelset was rated by road.cc with
- 8 out of 10 points for quality of construction
- 10 out of 10 points for performance
- 8 out of 10 points for durability
- 7 out of 10 points for weight
- Value: “You're getting a lot here for your money.“
January 29, 2021
road.cc website describes Swiss Side’s Hadron2 Ultimate 625 Disc as "the best bang-for-buck upgrade you can get" in its detailed review. They take a close look at the wheelset – from stability to tubeless setup to freehubs.
Their verdict: “Seriously impressive aerodynamic wheelset that delivers real-world speed and stiffness.”
The Hadron2 Ultimate 625 Disc wheelset was rated by road.cc with
- 8 out of 10 points for quality of construction
- 10 out of 10 points for performance
- 8 out of 10 points for durability
- 7 out of 10 points for weight
- Value: “You're getting a lot here for your money.“

HADRON Ultimate 625 rim brake - RennRad review (July 2020)
Our HADRON Ultimate 625 rim brake wheels have been thoroughly tested as part of RennRad Magazine's most recent aero wheel test (issue Nr. 7). Available in German only. Download here.
Verdict:
- Top acceleration
- Great aerodynamics
- Excellent lateral stiffness
- Fair price
July 06, 2020
Our HADRON Ultimate 625 rim brake wheels have been thoroughly tested as part of RennRad Magazine's most recent aero wheel test (issue Nr. 7). Available in German only. Download here.
Verdict:
- Top acceleration
- Great aerodynamics
- Excellent lateral stiffness
- Fair price