Transition Spire Carbon XT 2021
2021 Mountain
Estimate price |
6,699$
Weight | 14.86 kg 
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Carbon -
Wheels 29" -
Travel Front 170mm -
Travel Rear 170mm -
Fork Fox Factory Float 38
-
Groupset XT -
Suspension Full -
Brakes Hydraulic Disc
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
XXL Low
190cm - 207cm
XL Low
184cm - 200cm
XXL High
190cm - 207cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Spire Carbon 170mm
Suspension Fork
Fox Float 38 Grip 2 Factory, 170mm Travel/44mm Offset
Rear Shock
Fox Float X2 Factory, 2 Position (205x65)
Drivetrain
Rear Derailleur
Shimano XT M8100
Shift Levers
Shimano XT M8100
Cassette
Shimano XT M8100 (10-51t)
Crank
Shimano XT M8100 (30t/165mm)
Bottom Bracket
BSA, 73mm, threaded
Chain
Shimano XT M8100
Chain Guide
OneUp Bash Guide
Wheels
Front Hub
DT Swiss 350 Straight Pull 36SL
Rear Hub
DT Swiss 350 Straight Pull 36SL
Rims
DT Swiss EX 1700 Spline 30
Spokes
DT Swiss Competition
Tires
Front: Schwalbe Magic Mary, Super Trail, Soft (29x2.4), Rear: Schwalbe Big Betty, Super Trail, Soft (29x2.4)
Brakes
Brakes
Shimano XT M8120
Disk Rotors
Shimano RT86 (203mm)
Cockpit
Stem
ANVL Swage (40mm)
Handlebar
ANVL Mandrel Alloy 35, SM (800x20), MD/LG/XL (800x30), XXL (800x40)
Grips
Sensus Lite
Headset
FSA NO.55R/57
Seat
Saddle
ANVL Forge Cromo
Seatpost
OneUp Dropper Post
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM High | SM Low | MD High | MD Low | LG High | LG Low | XL High | XXL Low | XL Low | XXL High |
|---|---|---|---|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.45 mm | 1.47 mm | 1.35 mm | 1.38 mm | 1.3 mm | 1.32 mm | 1.25 mm | 1.23 mm | 1.27 mm | 1.21 mm |
| Bottom Bracket Height | 350 mm | 343 mm | 350 mm | 343 mm | 350 mm | 343 mm | 350 mm | 343 mm | 343 mm | 350 mm |
| Front Center | 782 mm | 783 mm | 812 mm | 813 mm | 842 mm | 843 mm | 871 mm | 902 mm | 872 mm | 901 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 | 146 mm | 141 mm |
| Stack | 613 mm | 618 mm | 613 mm | 618 mm | 622 mm | 627 mm | 631 mm | 645 mm | 636 mm | 640 mm |
| Reach | 424 mm | 419 mm | 454 mm | 449 mm | 479 mm | 474 mm | 504 mm | 524 mm | 499 mm | 529 mm |
| Top Tube Length | 541 mm | 544 mm | 571 mm | 574 mm | 599 mm | 602 mm | 627 mm | 628 mm | 630 mm | 655 mm |
| Seat Tube Angle | 79.6 ° | 79.1 ° | 78.8 ° | 78.3 ° | 78.1 ° | 77.6 ° | 77.5 ° | 76.7 ° | 77 ° | 77.2 ° |
| Seat Tube Length | 360 mm | 360 mm | 390 mm | 390 mm | 430 mm | 430 mm | 460 mm | 490 mm | 460 mm | 490 mm |
| Head Tube Angle | 63 ° | 62.5 ° | 63 ° | 62.5 ° | 63 ° | 62.5 ° | 63 ° | 62.5 ° | 62.5 ° | 63 ° |
| Head Tube Length | 100 mm | 100 mm | 100 mm | 100 mm | 110 mm | 110 mm | 120 mm | 130 mm | 120 mm | 130 mm |
| Chainstay Length | 440 mm | 442 mm | 440 mm | 442 mm | 440 mm | 442 mm | 446 mm | 448 mm | 448 mm | 446 mm |
| Wheelbase | 1221 mm | 1223 mm | 1251 mm | 1253 mm | 1281 mm | 1283 mm | 1316 mm | 1348 mm | 1318 mm | 1346 mm |
| Bottom Bracket Drop | 25 mm | 32 mm | 25 mm | 32 mm | 25 mm | 32 mm | 25 mm | 32 mm | 32 mm | 25 mm |
| Standover Height | 679 mm | 674 mm | 694 mm | 689 mm | 709 mm | 704 mm | 724 mm | 734 mm | 719 mm | 739 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 | 190 cm | 184 cm | 190 cm |
| Rider Max Height | 170 cm | 170 cm | 182 cm | 182 cm | 190 cm | 190 cm | 200 cm | 207 cm | 200 cm | 207 cm |
About this model
Spire Carbon XT completes the Transition Spire model. 28 bikes variations carry this model name so far. Take a sneak peek at all Transition Spire bikes models from 2021, by clicking here.
Model range prices
Transition Spire Alloy Deore 2021 is the most affordable bike of this model and has a price of 3799$. On the other hand, Transition Spire Carbon XT 2021, is the most expensive and costs 6699$.
Safety
Your safety should be the top priority when you go for a ride. In short, make sure that you always use a helmet, high visibility clothing, and proper lights when riding at night-time.
Enduro bikes average price
According to our calculations, the average cost of an Enduro bike that is reliable is 3599$. However, even though the average price of an Enduro bike is lower, you might still be able to get a top-quality bike. In short, before purchasing your ideal bike do some research about its components, and also check for reviews online.
When Transition released this model in 2021, its price was 6699$. Comparing the average cost of an Enduro bike to this one, you will see that Spire Carbon XT price is 86.14% higher.
Enduro bikes average weight
If we make a quick analysis of the average weight of an Enduro bike, we get 14.27 kg (31.46 lbs). Having an easier bike than average will give you a great advantage on climbs. However, a heavier bike will gain more speed on descends.
With a weight of 14.86 kg (32.76 lbs), Transition bike is slightly heavier than average. To sum up, it’s 4.13% heavier than the average weight of Enduro bikes.
Spire Carbon XT components
Fork
This bike has the Fox Factory Float 38 fork installed. The fork’s travel is 170mm. Bike forks are good shock absorbers and provide a smooth ride and a great experience. To sum up, when buying a bicycle, make sure you get a fork that is capable of delivering decent travel.
Rear Shock
Transition Spire Carbon XT bike has the Fox Float X2 Factory model installed, and has a travel of 170mm. Bike rear shocks increase the riding comfort, and also give you more control over technical trails. To sum up, get a full-suspension bike if you want the smoothest rides.
Wheels
The Spire Carbon XT 2021 bike is equipped with 29″ aluminum wheels when leaving the factory. With 29″ wheels, bumps will feel lighter and you’ll gain more speed on descends, compared to smaller wheel-sized bikes. However, the 29″ wheels will add a little more weight to the bike itself.
Brakes
Stopping the bike when needed, it’s essential for your safety. This bike has Hydraulic Disc brakes. Hydraulic disc brakes are perfect for mountain biking, road cycling, and commuting. To sum up, your safety is in good hands.
Sizes
This bike is available in 10 sizes. They vary from 154 cm – 207 cm (5.05 ft – 6.79 ft). In conclusion, finding one for you shouldn’t be a problem.
Dropper post
A dropper post is included with the Spire Carbon XT. If you are a technical rider, a dropper post is essential. A dropper post provides increased safety while riding. The lever system, allows you to move your saddle up and down, which is very useful on climbs and descends.