Transition Spire Alloy Frameset 2025

Bike details

Overview

Key information split into simple groups.

Frame summary

Category
- Mountain
- |
- Enduro
Frame Aluminum
Travel Front 170mm
Travel Rear 170mm
Suspension Full

Sizing

Recommended size guide.

SM High
154cm - 170cm
SM Low
154cm - 170cm
MD High
164cm - 182cm
MD Low
164cm - 182cm
LG High
175cm - 190cm
LG Low
175cm - 190cm
XL High
184cm - 200cm
XL Low
184cm - 200cm
XXL High
190cm - 207cm
XXL Low
190cm - 207cm

Parts list

Components

Main components, grouped by system.

Bike components

Frame

Spire Alloy 170mm

Rear Shock

Fox Float X2 Factory, (205x65mm)

Drivetrain

Bottom Bracket

73mm BSA Threaded

Wheels

Tires

29 x 2.6 (*see FAQ)

Cockpit

Headset

FSA NO.55R/57, (Included)

Fit data

Geometry

Numbers for sizing and ride feel.

Size	SM High	SM Low	MD High	MD Low	LG High	LG Low	XL High	XL Low	XXL High	XXL Low
Stack Reach Ratio	1.44 mm	1.468 mm	1.346 mm	1.371 mm	1.295 mm	1.319 mm	1.249 mm	1.271 mm	1.207 mm	1.228 mm
Bottom Bracket Height	350 mm	343 mm	350 mm	343 mm	350 mm	343 mm	350 mm	343 mm	350 mm	343 mm
Front Center	782 mm	783 mm	812 mm	813 mm	842 mm	843 mm	871 mm	872 mm	901 mm	902 mm
Rake	44 mm	44 mm	44 mm	44 mm	44 mm	44 mm	44 mm	44 mm	44 mm	44 mm
Trail	141 mm	146 mm	141 mm	146 mm	141 mm	145 mm	141 mm	146 mm	141 mm	146 mm
Stack	619 mm	624 mm	619 mm	624 mm	628 mm	633 mm	637 mm	642 mm	646 mm	651 mm
Reach	430 mm	425 mm	460 mm	455 mm	485 mm	480 mm	510 mm	505 mm	535 mm	530 mm
Top Tube Length	547 mm	550 mm	577 mm	580 mm	605 mm	608 mm	633 mm	636 mm	661 mm	664 mm
Seat Tube Angle	79.6 °	79.1 °	78.8 °	78.3 °	78.1 °	77.6 °	77.5 °	77 °	77.2 °	76.7 °
Seat Tube Length	360 mm	360 mm	390 mm	390 mm	430 mm	430 mm	460 mm	460 mm	490 mm	490 mm
Head Tube Angle	63 °	62.5 °	63 °	62.5 °	63 °	62.5 °	63 °	62.5 °	63 °	62.5 °
Head Tube Length	100 mm	100 mm	100 mm	100 mm	110 mm	110 mm	120 mm	120 mm	130 mm	130 mm
Chainstay Length	446 mm	448 mm	446 mm	448 mm	446 mm	448 mm	452 mm	454 mm	452 mm	454 mm
Wheelbase	1227 mm	1229 mm	1257 mm	1259 mm	1287 mm	1289 mm	1322 mm	1324 mm	1352 mm	1354 mm
Bottom Bracket Drop	25 mm	32 mm	25 mm	32 mm	25 mm	32 mm	25 mm	32 mm	25 mm	32 mm
Standover Height	685 mm	680 mm	700	695 mm	715 mm	710 mm	730 mm	725 mm	745 mm	740 mm
Wheels	29"	29"	29"	29"	29"	29"	29"	29"	29"	29"
Rider Min Height	154 cm	154 cm	164 cm	164 cm	175 cm	175 cm	184 cm	184 cm	190 cm	190 cm
Rider Max Height	170 cm	170 cm	182 cm	182 cm	190 cm	190 cm	200 cm	200 cm	207 cm	207 cm

Model years

Transition Spire Alloy Frameset 2025

Key information split into simple groups.

Frame summary

Recommended size guide.

Main components, grouped by system.

Bike components

Frame

Frame

Rear Shock

Drivetrain

Bottom Bracket

Wheels

Tires

Cockpit

Headset

Numbers for sizing and ride feel.

Related bike families.

Transition Spire models from 2025

Transition Spire models from 2024

Transition Spire models from 2023

Transition Spire models from 2022

Transition Spire models from 2021