2026 Specialized Aethos 2 vs 2026 BMC Roadmachine TWO
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the BMC Roadmachine TWO
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Aethos 2 is drawn. The BMC Roadmachine TWO numbers we have for size 54 are missing the reach, stack, seat angle, chainstay length and wheelbase.
Geometry side by side
| Measurement | Specialized Aethos 2 49 | BMC Roadmachine TWO 54 | Difference |
|---|---|---|---|
| Reach | 373 | not listed | |
| Stack | 522 | not listed | |
| Head tube angle | 71.4 | 72.2 | +0.8° |
| Seat tube angle | 75.5 | not listed | |
| Effective top tube | 508 | not listed | |
| Chainstay length | 410 | not listed | |
| Wheelbase | 978 | not listed | |
| BB drop | 75.5 | not listed | |
| Head tube length | 114 | not listed | |
| Standover | not listed | 770 | |
| Fork length | not listed | not listed |
Differences are the BMC Roadmachine TWO minus the Specialized Aethos 2. Full charts: 2026 Specialized Aethos 2, 2026 BMC Roadmachine TWO.
Where each sits in its class
Specialized Aethos 2BMC Roadmachine TWO
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Aethos 2S-Works | BMC Roadmachine TWOTWO |
|---|---|---|
| Frame | Specialized Aethos 2 | BMC Roadmachine |
| Shifter | SRAM RED | Shimano 105 R7170 |
| Derailleur | SRAM Red AXS E1 | Shimano 105 R7150 Di2, Shimano 105 R7150 |
| Cassette | Shimano Dura-Ace R9200 | Shimano CS-HG710 |
| Chain | SRAM RED E1 | Shimano Deore M6100 |
| Crankset | SRAM Powermeter Red AXS | Shimano 105 R7100 |
| Chainring | Shimano Dura-Ace R9200 | Shimano 50T, Shimano 34T |
| Bottom bracket | SRAM DUB | Shimano BB-RS500-PB |
| Wheelset | Roval Alpinist CLX III | PRD23 |
| Tire | Specialized Turbo TLR Race | Vittoria Rubino V |
| Hub | Roval LF21-F | not listed |
| Brake | Shimano Dura-Ace R9200 | Shimano 105 R7170 Di2 |
| Rotor | Shimano Dura-Ace R9200 | Shimano SM-RT70, Shimano 160mm |
| Handlebar | Roval Alpinist Cockpit II | BMC HB D4 03 |
| Stem | Roval Alpinist Cockpit II | BMC RSM 01 |
| Bar tape | Supacaz Super Sticky Kush | not listed |
| Headset | CeramicSpeed SLT | not listed |
| Seatpost | Roval Alpinist | BMC Roadmachine Carbon D-shaped |
| Saddle | Specialized Power | Selle Italia Model X Superflow |
| Bag | not listed | Storage Pouch |
| Light | not listed | BMC Integrated Rear Light 25 |
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