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Felt IA 2.0 vs Trek Speed Concept SLR
Pick up to 4 bikes. Rows line up component by component. Highlighted rows differ, and green marks the best value where lower or higher is clearly better.
Key differences
- The Trek Speed Concept SLR starts $499 cheaper ($9,500 vs $9,999 for the Felt IA 2.0).
- Our verdict scores the Trek Speed Concept SLR higher overall: 78/100 vs 77/100.
- Only the Trek Speed Concept SLR is UCI legal, so only it can be raced in UCI time trials.
- The Felt IA 2.0 comes in 5 sizes, the Trek Speed Concept SLR in 4.
Felt IA 2.0
Trek Speed Concept SLR
| FeltIA 2.0 | TrekSpeed Concept SLR | |
|---|---|---|
| Overview | ||
| Brand | Felt | Trek |
| Build | IA 2.0 FRD Shimano Dura-Ace Di2 | Speed Concept SLR 9 AXS |
| Build notes | — | New listing (product 86500) replacing the earlier SLR 9 AXS (35756), now with SRAM Red AXS E1. The ICON Northern Lights paint costs $16,499.99 / £12,950 / €14,399. Trek's spec also lists Aeolus RSL 65X wheels; its summary spec gives Aeolus RSL 51. GBP and EUR from trekbikes.com/gb and /de. |
| Price (MSRP) | $13,999$13,999$13,999 | €11,999$14,500£10,750 |
| Bike weight | 9.37 kg20.7 lb | — |
| Weight measured on size | M | — |
| Model year | 2026 | 2026 |
| Generation | 2nd generation IA | 3rd generation (Speed Concept 3.0) |
| Launched | 2022 | — |
| Discipline | Triathlon | Triathlon |
| UCI legal | No | Yes |
| Recalls on record | — | 1 |
| Verdict (out of 100) | ||
| Overall score | 77 | 78 |
| Aero | 85 | 84 |
| Frame | 82 | 86 |
| Components | 84 | 80 |
| Hydration & storage | 88 | 84 |
| Fit | 78 | 88 |
| Practicality | 62 | 64 |
| Price | 60 | 63 |
| Frame & fork | ||
| Frame material | Carbon (FRD 12K Carbon Light) | 800 Series OCLV Carbon |
| Fork material | Carbon (FRD 12K Carbon Light) | Carbon (SC full foil, integrated brake and stem) |
| Frameset weight | 4,200 g9.26 lb | — |
| Weight measured on | FRD framekit (frame, fork, basebar), size M as listed by Felt | — |
| Max system weight | 120 kg264.6 lb | — |
| Frame sizes | 48, 51, 54, 56, 58 | S, M, L, XL |
| Colours | FRD 12K Matte (FRD build and framekit), Glossy Burgundy (Pro) | Matte Deep Smoke, Party Purple and Serpentine (SLR 9 AXS, SLR 9, SLR 7 AXS, SLR 7); ICON Northern Lights (SLR 9 AXS); Metallic Red Smoke to Carbon Red Smoke Fade (SLR 7, US); Hex Blue/Trek Black (SLR 7, UK); Deep Smoke/Gloss Trek Black (frameset) |
| Also available as | IA 2.0 UD Carbon STD (lower-grade frame and fork, same geometry) on the Expert and Race builds | Speed Concept SLR TT frameset (no bento box, flat kit or IsoSpeed, slightly more aggressive handling geometry) |
| UCI frame approval | — | UCI-approved as 'MY22 Speed Concept SLR' (frame and fork code TREK-062), approved 28.01.2021, sizes S to XL (4) (UCI list version 2026.10.02) |
| UCI configuration | Not UCI-legal: Triathlete says the depth of the tubes rules it out | — |
| Compatibility & standards | ||
| Brake type | Disc | Hydraulic disc, flat mount |
| Max rotor size | — | 160 mm |
| Wheel size | 700c | 700c |
| Max tire width | — | 25 mm |
| Bottom bracket standard | — | T47 threaded (85.5 mm) |
| Front axle | — | 12x100 thru-axle |
| Rear axle | — | 12x142 thru-axle |
| Drivetrain compatibility | — | Optimised for electronic groupsets only; Trek says mechanical may be possible but does not guarantee smooth cable pull |
| 1x compatible | — | Yes |
| Max chainring | — | 58T |
| Front derailleur mount | — | Braze-on |
| Cable routing | — | Internal |
| Electronic battery location | — | Inside the seatpost (battery mount assembly) |
| Hydration & storage | ||
| Integrated hydration | Yes | Yes |
| Hydration volume | 900 ml30.4 fl oz | — |
| Hydration details | THIRSTpac reservoir in the raised top tube, about 0.9 L according to road.cc. It has a quick-fill port, a cover to stop sloshing and a drinking straw that runs to the cockpit. Other reviews quote 26 oz and 30 oz. | Aero downtube bottle with frame-specific cage included; a between-the-arms bottle is not included. |
| Integrated storage | Yes | Yes |
| Storage volume | 200 ml6.8 fl oz | — |
| Storage details | CALpac top tube nutrition compartment (0.2 L, access slot along the top). ITSpac compartment inside the seat tube for a tool kit, spare tube, tire levers and CO2. | Integrated top-tube bento box and integrated downtube flat-kit storage (contents not included). |
| Top tube bento box | Yes | Yes |
| Bottle mount locations | — | Downtube (aero bottle) |
| Fit & adjustability | ||
| Aerobar system | Felt IA 2.0 carbon basebar; road.cc says it works with most aftermarket aerobar systems | Integrated Speed Concept cockpit: base towers, tower toppers and low/mid/high-rise basebars |
| Third-party aerobars possible | Yes | — |
| Pad stack adjustment range | — | Back-of-pad stack from 537.9 mm (S, low basebar) to 746 mm (XL, high basebar), depending on basebar rise and towers |
| Pad reach adjustment range | — | Back-of-pad reach from 310.5 mm (S, near topper) to 530.1 mm (XL, far topper) |
| Seatpost type | Felt IA 2.0 dedicated carbon seatpost | Speed Concept SLR seat mast with 11.5 mm or -20 mm offset head |
| Effective seat angle range | — | 78° (nominal) |
| Fit notes | According to road.cc, riser height and angle, extension width and length, armrest fore-aft and width, and basebar grip height are all adjustable. Cyclenews' reviewer still found the elbow rests and extensions too close together. | Trek publishes a fit assistance chart listing pad stack and reach for each size with near/mid/far tower toppers and low/mid/high-rise basebars. Some low/near combinations can make the pads hit the top tube. |
| Aerodynamics | ||
| Manufacturer aero claims | 1.9% faster than the previous IA across -20° to 20° yaw, and 4% faster across -12.5° to 12.5°, the range Felt says riders spend about 90% of their time in | — |
| Tube profile | — | KVF (Kammtail Virtual Foil) |
| Travel, maintenance & warranty | ||
| Maintenance | — | Trek says only authorised dealers should service the IsoSpeed. |
| Proprietary parts | — | Integrated fork/stem/basebar, tower cockpit, seat mast, downtube bottle and cage |
| Sold via | Dealers | Trek retailers and trekbikes.com |
| Drivetrain | ||
| Groupset | Shimano Dura-Ace Di2 R9200 | SRAM Red AXS E1 |
| Launched | 2021 · current generation | 2024 · current generation |
| Speeds | 12-speed | 12-speed |
| Electronic | Yes | Yes |
| Wireless | — | Yes |
| Drivetrain | — | 2x |
| Shifters | Shimano Dura-Ace Di2 SW-R9160 | SRAM AXS Wireless Blips |
| Position | — | Extension and basebar |
| Crankset | Shimano Dura-Ace R9200 | SRAM Red AXS E1 Power Meter |
| Chainrings | 52/36 | 48/35 |
| Crank length | 165 (48, 51) / 170 (54, 56) / 172.5 (58) | 160 (S) / 165 (M, L) / 170 (M, L, XL) as listed by Trek |
| Power meter | 4iiii Precision Pro | SRAM Red AXS E1 Power Meter |
| Launched | — | 2024 · current generation |
| Type | — | Integrated in crankset |
| Measurement | Dual-sided | — |
| Bottom bracket | Shimano Dura-Ace BB-R9100 | SRAM DUB T47 |
| Standard | — | T47 threaded, internal bearing |
| Front derailleur | Shimano Dura-Ace Di2 R9250 | SRAM Red AXS E1 |
| Rear derailleur | Shimano Dura-Ace Di2 R9250 | SRAM Red AXS E1 |
| Max cog | — | 36T |
| Cassette | Shimano Dura-Ace R9200 | SRAM Red XG-1290 E1 |
| Range | 11-30 | 10-33 |
| Speeds | 12-speed | 12-speed |
| Chain | Shimano CN-M8100 | SRAM Red E1 |
| Brakes | ||
| Brake levers | — | SRAM Red Aero |
| Brake calipers | Shimano Dura-Ace BR-R9180 | — |
| Type | Hydraulic disc, 2-piston | — |
| Rotors | Shimano RT-CL800 | SRAM Paceline X |
| Front rotor | 140 mm | 160 mm |
| Rear rotor | 140 mm | 160 mm |
| Mount | Center Lock | Center Lock |
| Wheels & tires | ||
| Wheelset | Vision Metron 60 (front) / Metron 91 SL (rear) | Bontrager Aeolus RSL 51 |
| Front rim depth | 60 mm | 51 mm |
| Rear rim depth | 91 mm | 51 mm |
| Rear disc wheel | No | No |
| Internal rim width | 21 mm | — |
| Material | Carbon | Carbon |
| Tubeless ready | — | Yes |
| Tires | Continental Grand Prix 5000 TT | Bontrager R4 320 |
| Tire width | 25 mm | 25 mm |
| Cockpit | ||
| Aerobar system | — | Trek Speed Concept cockpit (base towers + tower toppers) |
| Integrated with frame | — | Yes |
| Pad stack adjustment | — | Base towers 30/45/60 mm by size; low, mid or high-rise basebar |
| Notes | — | Near, mid or far tower topper sets pad reach |
| Basebar | Felt IA 2.0 Carbon Basebar | Trek Speed Concept mid-rise bar/stem (integrated) |
| Headset | — | FSA Integrated, sealed cartridge bearing, 1-1/8 in top, 1.5 in bottom |
| Saddle & seatpost | ||
| Saddle | Prologo TGale PAS Slide Control Tirox 128 | Bontrager Hilo Pro Carbon |
| Seatpost | Felt IA 2.0 Dedicated SP Carbon | Trek Speed Concept SLR |
| Offset / setback | — | 11.5 mm or -20 mm |
| Notes | — | Short length on S, tall on M-XL |
| Included extras | ||
| Hydration system | Felt THIRSTpac | — |
| Volume | 900 ml30.4 fl oz | — |
| Storage / bento | Felt CALpac + ITSpac | — |
| Volume | 200 ml6.8 fl oz | — |
| Notes | Volume is for the CALpac top tube compartment | — |
| Bottle cages | — | Trek Speed Concept Downtube Bottle Cage + Downtube Bottle |
| Geometry (smallest – largest size) | ||
| Sizes | 48, 51, 54, 56, 58 | S, M, L, XL |
| Rider height min | — | 154–186 cm5–6′1″ |
| Rider height max | — | 167–198 cm5–6′6″ |
| Stack | 478–572 mm18.8–22.5″ | 492–565 mm19.4–22.2″ |
| Reach | 379–445 mm14.9–17.5″ | 390–445 mm15.4–17.5″ |
| Pad stack min | — | 537.9–610.5 mm21.2–24″ |
| Pad stack max | — | 674.3–746 mm26.5–29.4″ |
| Pad reach min | — | 310.5–363.1 mm12.2–14.3″ |
| Pad reach max | — | 477.5–530.1 mm18.8–20.9″ |
| Seat angle min | 77.5–79.5° | 78° |
| Seat angle max | 77.5–79.5° | 78° |
| Head tube angle | 71.5–72° | 72.2–72.5° |
| Head tube length | 67.5–163 mm2.7–6.4″ | 65–140 mm2.6–5.5″ |
| Effective top tube | 468–573 mm18.4–22.6″ | 495–565 mm19.5–22.2″ |
| Seat tube length | 496–598 mm19.5–23.5″ | 499–574 mm19.6–22.6″ |
| Chainstay | 405 mm15.9″ | 410 mm16.1″ |
| Wheelbase | 970–1,058 mm38.2–41.7″ | 967–1,047 mm38.1–41.2″ |
| BB drop | 72 mm2.8″ | 80 mm3.1″ |
| Fork offset | 45–50 mm1.8–2″ | 45 mm1.8″ |
| Trail | — | 60–61 mm2.4–2.4″ |
| Standover | 735–793 mm28.9–31.2″ | 760–831 mm29.9–32.7″ |
| Saddle height min | — | 559–628 mm22–24.7″ |
| Saddle height max | — | 756–830 mm29.8–32.7″ |
| Wheel size | — | 700c |
| Crank length | 165–172.5 mm6.5–6.8″ | — |
Geometry overlay
Pick a size for each bike to see frames and arm-pad ranges on top of each other.
Drawn to scale (how to read it).