Transition Spire Alloy GX 2021
2021 Mountain
Estimate price |
4,899$
Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 29" -
Travel Front 170mm -
Travel Rear 170mm -
Fork RockShox ZEB Ultimate
-
Groupset GX Eagle -
Suspension Full -
Drivetrain 1 × 12 -
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 Alloy 170mm
Suspension Fork
RockShox ZEB Ultimate, 170mm Travel/44mm Offset
Rear Shock
RockShox Super Deluxe, Ultimate Air (205x65)
Drivetrain
Rear Derailleur
SRAM GX Eagle
Shift Levers
SRAM GX Eagle
Cassette
SRAM XG 1275 (10-52t)
Crank
SRAM GX Alloy DUB (30t/165mm)
Chain
SRAM GX Eagle
Chain Guide
OneUp Bash Guide
Wheels
Front Hub
Stans Neo Durasync
Rear Hub
Stans Neo Durasync
Rims
Stans Flow S1
Spokes
Sapim Race Double Butted
Tires
Front: Schwalbe Magic Mary, Super Trail, Soft (29x2.4), Rear: Schwalbe Big Betty, Super Trail, Soft (29x2.4)
Brakes
Brakes
SRAM Code RSC
Disk Rotors
SRAM Centerline (220mm/200mm)
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 |
Model Overview
Spire Alloy GX belongs to the Transition Spire model. 28 bikes variations carry this model name so far. You can easily view all of the Transition Spire bikes models from 2021, 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
When you go for a ride, don’t forget to put your helmet on. Moreover, ride with traffic, not against it. This will help you stay visible to drivers and also makes it easier for them to see you.
Average price for Enduro bikes
If you want to purchase a solid Enduro bike, it is important to know that the average cost is 3599$. However, this doesn’t mean that if you spend less money on an Enduro bike, you couldn’t get a decent one. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
Furthermore, this bike was made available in 2021 for 4899$. Comparing this to the average Enduro bike price, we see that the price is 36.12% more expensive.
Overview of components
Fork
Transition Spire Alloy GX 2021 bike is equipped with the RockShox ZEB Ultimate fork, and has 170mm travel. Bike forks are great for shock absorption and provide you with a smooth ride. To sum up, when buying a bicycle, make sure you get a fork that is capable of delivering decent travel.
Rear Shock
Transition Spire Alloy GX bike has the RockShox Super Deluxe 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, always consider getting a bike that has a rear shock as well.
Wheels
The Spire Alloy GX 2021 bike is equipped with 29″ aluminum wheels when leaving the factory. These wheels are more forgiving when you go over roots, rocks, bumps, or other obstacles you encounter on your ride. However, these wheels are not ideal for smaller people.
Brakes
We ride faster and faster, so a good braking system is essential on a bike nowadays. The Spire Alloy GX comes with Hydraulic Disc brakes. With Hydraulic Disc brakes, you’ll be able to stop on a dime, even in wet or icy conditions. To sum up, your safety is in good hands.
Sizes
Spire Alloy GX comes in 10 sizes, that range from 154 cm – 207 cm (5.05 ft – 6.79 ft). In conclusion, finding one for you shouldn’t be a problem.
Dropper post
Transition Spire Alloy GX includes a dropper post. If used correctly, a dropper post gives you more faith, maneuverability, and greater control over your bike.