
Transition Spire
Transition call the Spire the "Nimble Bruiser". It's a lot of bike, but it still pedals well.
- 170 mm 29er with a 63-degree head angle (which can be set even slacker).
- Collet main pivot axle and Enduro MAX bearings.
- Accessory mount.
- Lifetime warranty for original owner.
- Flush mounted rubber frame protection.
- Two chainstay sizes (S/M/L and XL/XXL).
- Dual crown fork compatible.
- 2.6" tyre clearance.
- Carbon frame features internal cable routing with guides.
- Threaded BB - Boost axles - SRAM UDH (Universal Derailleur Hanger).
Transition Spire Geometry & Sizing

Transition Spire Geometry | |||||
---|---|---|---|---|---|
Sizes in MM | S High/Low |
M High/Low |
L High/Low |
XL High/Low |
XXL High/Low |
A: Stack | 619/624 | 619/624 | 628/633 | 637/642 | 646/651 |
B: Reach | 430/425 | 460/455 | 485/480 | 510/505 | 535/530 |
C: Head Tube Angle |
63/62.5° | 63/62.5° | 63/62.5° | 63/62.5° | 63/62.5° |
D: Head Tube Length |
100 | 100 | 110 | 120 | 130 |
E: Effective Seat Tube Angle |
79.6/79.1° | 78.8/78.3° | 78.1/77.6° | 77.5/77° | 77.2/76.7° |
F: Seat Tube Length |
360 | 390 | 430 | 460 | 490 |
G: Effective Top Tube |
547/550 | 577/580 | 605/608 | 633/636 | 661/664 |
H: BB Height | 350/343 | 350/343 | 350/343 | 350/343 | 350/343 |
I: BB Drop | 25/32 | 25/32 | 25/32 | 25/32 | 25/32 |
J: Chainstay Length | 446/448 | 446/448 | 446/448 | 446/448 | 446/448 |
K: Wheelbase | 1227/1229 | 1257/1259 | 1287/1289 | 1322/1324 | 1352/1354 |
L: Standover | 685/680 | 700/695 | 715/710 | 730/725 | 745/740 |
M: Fork Offset | 44 | 44 | 44 | 44 | 44 |
Seatpost Diameter | 31.6 | 31.6 | 31.6 | 31.6 | 31.6 |
Handlebar Width | 800 | 800 | 800 | 800 | 800 |
Stem Length | 40 | 40 | 40 | 40 | 40 |
Crank Length | 165 | 165 | 165 | 165 | 165 |
