Madone SLR 8 AXS Gen 8
Trek
Aero
Madone SLR 8 AXS Gen 8 is a carbon aero road bike (2025), by Trek, from the Madone lineup. Rider-wise, it fits riders who want a sporty road feel without a full race fit, with a sporty riding position, while being best matched to paved roads. The main strengths in the metrics are a clearly aero-focused setup for faster road riding, strong speed potential on smoother terrain, and good fit flexibility for dialing in rider position. That said, the trade-off to keep in mind is a firmer ride feel than comfort-first options. If this looks close to what you want, compare this bike on MatchBikes.com against similar models.
5.8
Rating

+19
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Score Summary
Performance
5.8
Value
5.6
Fit
6.0
Performance
Built for speed and efficiency
Speed
7.7
High
Climbing Efficiency
2.7
Hefty but Manageable
Aerodynamics
9.2
Full Aero
Fit
Dialed-in Fit & Comfort
Riding Position
6.8
Sporty
Fit Flexibility
7.2
Adjustable
Ride Comfort
3.1
Firm
Value
Value for Money
5.6
Fair Value
Surface Range
Road OnlySpecifications
General
Brand
Trek
Model
Madone SLR 8 AXS Gen 8
Year
2025
Price
$9,975
Category
Road
Sub Category
Aero
Groupset
RED AXS
Frame
Frame
900 Series OCLV Carbon, Full System Foil tube shaping, IsoFlow seat tube, RCS Headset System, electronic-only routing, removable aero chainkeeper, T47 BB, flat mount disc, UDH, 142x12mm thru axle
Suspension Fork
Madone Gen 8 one-piece carbon, tapered carbon steerer, internal brake routing, flat mount disc, 12x100mm chamfered thru axle
Suspension Type
Rigid
Drivetrain
Shift Levers
SRAM RED eTap AXS, 12 speed
Rear Derailleur
SRAM RED eTap AXS, 36T max cog
Front Derailleur
SRAM RED eTap AXS, braze-on
Cassette
SRAM XG-1290, 10-33, 12 speed
Crank
Size: XS, S, SRAM RED AXS w/ power meter, 48/35, DUB, 165mm length; Size: M, SRAM RED AXS, power meter, 48/35, DUB, 170mm length; Size: ML, L, SRAM RED AXS, power meter, 48/35, DUB, 172.5mm length; Size: XL, SRAM RED AXS, power meter, 48/35, DUB, 175mm length
Bottom Bracket
SRAM DUB, T47 threaded, internal bearing
Chain
SRAM RED D1, 12 speed
Wheels
Rims
Front: Bontrager Aeolus Pro 51, OCLV Carbon, Tubeless Ready, 100x12mm thru axle, Rear: Bontrager Aeolus Pro 51, OCLV Carbon, Tubeless Ready, SRAM XD-R driver, 142x12mm thru axle
Tires
Size: XS, S, M, ML, L, XL, Bontrager Aeolus RSL RD, Tubeless Ready, cotton construction, aramid bead, 170 tpi, 700x28mm; Size: XS, S, M, ML, L, XL, Pirelli P Zero Race, 120 tpi, tubeless compatible, 700x28mm
Brakes
Brake Type
Hydraulic Disc
Brake Description
SRAM CenterLine X, centerlock, round edge, 160mm
Seat
Saddle
Size: XS, S, Bontrager Aeolus P2 Pro, carbon rails, 155mm width; Size: M, ML, L, XL, Bontrager Aeolus Pro, carbon rails, 145mm width
Seatpost
Size: XS, S, M, XL, Madone aero carbon seatpost, 0mm offset, short length; Size: ML, L, Madone aero carbon seatpost, 0mm offset, long length
Geometry
| Measurement | XS | SM | MD | MD/LG | LG | XL |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.37 mm | 1.402 mm | 1.422 mm | 1.445 mm | 1.477 mm | 1.517 mm |
| Bottom Bracket Height | 264 mm | 264 mm | 266 mm | 266 mm | 268 mm | 268 mm |
| Front Center | 572 mm | 577 mm | 581 mm | 580 mm | 589 mm | 604 mm |
| Rake | 50 mm | 45 mm | 45 mm | 40 mm | 40 mm | 41 mm |
| Trail | 61 mm | 62 mm | 58 mm | 59 mm | 57 mm | 57 mm |
| Stack | 507 mm | 530 mm | 546 mm | 562 mm | 582 mm | 610 mm |
| Reach | 370 mm | 378 mm | 384 mm | 389 mm | 394 mm | 402 mm |
| Top Tube Length | 517 mm | 532 mm | 545 mm | 557 mm | 568 mm | 584 mm |
| Seat Tube Angle | 73.8 ° | 73.8 ° | 73.6 ° | 73.4 ° | 73.4 ° | 73.4 ° |
| Seat Tube Length | 404 mm | 440 mm | 476 mm | 512 mm | 548 mm | 609 mm |
| Head Tube Angle | 71.6 ° | 72.2 ° | 72.9 ° | 73.5 ° | 73.8 ° | 73.9 ° |
| Head Tube Length | 100 mm | 121 mm | 136 mm | 150 mm | 172 mm | 201 mm |
| Chainstay Length | 410 mm | 410 mm | 410 mm | 410 mm | 411 mm | 412 mm |
| Wheelbase | 971 mm | 976 mm | 981 mm | 980 mm | 990 mm | 1007 mm |
| Bottom Bracket Drop | 72 mm | 72 mm | 70 mm | 70 mm | 68 mm | 68 mm |
| Standover Height | 704 mm | 734 mm | 762 mm | 790 mm | 820 mm | 863 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 |
| Rider Min Height | 155 cm | 163 cm | 170 cm | 175 cm | 181 cm | 188 cm |
| Rider Max Height | 168 cm | 174 cm | 181 cm | 187 cm | 193 cm | 200 cm |




























































