All new for 2021! A 170 mm 29er with the latest version of Transitions "Giddy Up" suspension platform, with improved small bump sensitivity and mid-stroke support.
The new Spire's frame has a flip chip at the lower shock mount, though from what we've been told by Transition the higher setting sounds like the better setting for typical UK trails.
There's more adjustment at the head tube, with a ZS56/ZS56 press fit headset, which you can replace with an angleset to change reach or head tube angle.
Chainstay length increases on the XL and XXL size frames, from 446 mm on the S, M and L bikes to 452 on the XL and XXL bikes, and there's clearance for a 2.6 tyre.
This alloy XT spec bike has Fox Factory suspension front and rear. All models have four piston brakes and 165 mm cranks.
Our first deliveries will start arriving in June, and we'll have more bikes delivered in July and August. If you would like to order a bike, please call us on 01330 828562 to leave a deposit. (You can read more about ordering bikes from 20Twenty here.)
Read more about the new Transition Spire here.
- High and low geometry options via lower shock mount flip chip.
- Two chainstay lengths, short on S, M & L and long on XL & XXL.
- New oversized parallel headtube enabling the use of reach or angle adjustment headsets.
- Frame protection on chainstay, seat stay and downtube "shuttle guard".
- EnduroMAX frame bearings.
Cycle to Work
UK customers - you can use the Government’s “Cycle to Work” scheme to buy this bike from 20Twenty, and you could save 25-39%. You can buy a bike, bike and accessories, or just accessories through the Cycle to Work scheme. We can even provide you with a custom-built bike through the scheme.
We use Cyclescheme to administer Cycle to Work bike sales. Your employer needs to be registered with Cyclescheme. If they are not, they can sign up here.
There is no £1000 limit any more, though your employer might have a limit. You can use the Cyclescheme calculator to work out what you might save here.
For more information, click here to contact us or call 01330 828562
Sizing & Geo
Spire Geo (High Setting) |
Small |
Medium |
Large |
X-Large |
XX-Large |
Reach |
430 |
460 |
485 |
510 |
535 |
Stack |
619 |
619 |
628 |
637 |
646 |
Effective TT Length |
547 |
577 |
605 |
633 |
661 |
Seat Tube Length |
360 |
390 |
430 |
460 |
490 |
Effective ST Angle |
79.6 |
78.8 |
78.1 |
77.5 |
77.2 |
Saddle Height For Effective ST Angle |
600 |
660 |
720 |
780 |
820 |
Actual ST Angle |
70.5 |
70.5 |
70.5 |
70.5 |
70.5 |
Seat Tube Offset At BB |
100 |
100 |
100 |
100 |
100 |
Headtube Length |
100 |
100 |
110 |
120 |
130 |
Head Tube Angle |
63.0 |
63.0 |
63.0 |
63.0 |
63.0 |
Chainstay Length |
446 |
446 |
446 |
452 |
452 |
Wheelbase |
1227 |
1257 |
1287 |
1322 |
1352 |
Bottom Bracket Drop |
25 |
25 |
25 |
25 |
25 |
Estimated BB Height |
350 |
350 |
350 |
350 |
350 |
Stand Over Height |
685 |
700 |
715 |
730 |
745 |
Fork Offset |
44 |
44 |
44 |
44 |
44 |
Spire Geo (Low Setting) Approx. |
Small |
Medium |
Large |
X-Large |
XX-Large |
Reach |
425 |
455 |
480 |
505 |
530 |
Stack |
624 |
624 |
633 |
642 |
651 |
Effective TT Length |
550 |
580 |
608 |
636 |
664 |
Seat Tube Length |
360 |
390 |
430 |
460 |
490 |
Effective ST Angle |
79.1 |
78.3 |
77.6 |
77.0 |
76.7 |
Saddle Height For Effective ST Angle |
600 |
660 |
720 |
780 |
820 |
Actual ST Angle |
70.0 |
70.0 |
70.0 |
70.0 |
70.0 |
Seat Tube Offset At BB |
100 |
100 |
100 |
100 |
100 |
Headtube Length |
100 |
100 |
110 |
120 |
130 |
Head Tube Angle |
62.5 |
62.5 |
62.5 |
62.5 |
62.5 |
Chainstay Length |
448 |
448 |
448 |
454 |
454 |
Wheelbase |
1229 |
1259 |
1289 |
1324 |
1354 |
Bottom Bracket Drop |
32 |
32 |
32 |
32 |
32 |
Estimated BB Height |
343 |
343 |
343 |
343 |
343 |
Stand Over Height |
685 |
700 |
715 |
730 |
745 |
Fork Offset |
44 |
44 |
44 |
44 |
44 |
Spec
Rear Shock Fox Float X2 Factory 2 Position (170 mm Travel/205x65 mm) Fork Fox Float 38 Grip 2 Factory 29 (170 mm Travel/44 mm Offset) Headset FSA NO.55R/57 Stem ANVL Swage (40 mm) Bar ANVL Mandrel Alloy Grips Sensus Lite Sadde ANVL Forge Cromo or WTB Silverado Seatpost OneUp Dropper Post Brakes Shimano XT M8120 Rotors Shimano RT86 (203 mm) Shifter Shimano XT M8100 Derailleur Shimano XT M8100 Cassette Shimano XT M8100 (10-51t) Chain Shimano XT M8100 Crank Shimano XT M8100 (30t/165mm) Chainguide OneUp Bash Guide V2 Wheelset/Rims DT Swiss EX 1700 Spline 30 Spokes DT Swiss Competition Hubs DT Swiss 350 Straight Pull 36SL Front Tire Schwalbe Magic Mary, Super Trail, Soft (29x2.4) Rear Tire Schwalbe Big Betty, Super Trail, Soft (29x2.4) Other Tubeless Valves & Stans Sealant (6oz)
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