2025 Transition Spire Carbon GX 29"

Spire Carbon
The Spire carbon uses premium Japanese Toray fiber using a unique latex coated EPS molding process

Pivot Technology
Collet main pivot technology improves rear end stiffness and keeps your pivot hardware tight. Additional bearing shields prevent main pivot bearing contamination when washing your bike or riding in wet conditions.

Frame Protection
We keep your bike rides quiet and your frame safe from damage with fully integrated, flush-mounted rubber frame protection at all critical areas. In addition to downtube and seatstay protection, the ribbed chainstay protector features expanded coverage of the rear dropout pivot area.

Geo Adjust Chip
Change the attitude of the bike with a simple flip of a chip. Our high and low settings give you two very usable geo settings to suite your riding style. Our high settings is comparable to most other companies low setting so there is a high shred warning in effect.

Size-specific Chainstays
The Spire has two size specific chainstays lengths to provide balanced handling and rider weight distribution across the range of sizes.

Gear Accessory Mount
Our underside top-tube accessory mount allows you to carry a spare tube or other goodies safely on your frame in case you are looking to ditch the backpack.

Tire Clearance
Ample clearance for mud and tires up to 2.6" width.

User Friendly Cable Routing
To simplify maintenance and keep your bike noise free, the rear derailleur cable is routed through guide tubes in the front triangle chainstay.

UDH
The Spire features a SRAM UDH that protects your derailleur against chain jams by pivoting back and out of the way, and slips slightly when encountering impacts. It improves shifting performance, guarantees better alignment, works with all drivetrains and is available anywhere.

GiddyUp Suspension Design
We want to make it as easy as possible to experience great rear suspension performance. The GiddyUp suspension system is designed to behave intuitively across a broad range of setup. Because, we get it, sometimes you just want to grab your bike and GiddyUp, without checking your setup. When you do, it will always feel good.

Lifetime Warranty
At Transition bikes we take pride in the quality of our products and are stoked to offer a lifetime warranty for the original owner and our stellar crash replacement program. We got your back so you don't have to worry about your bike.

Enduro Max Bearings
We exclusively use Enduro Max suspension pivot specific bearings in standard sizes that are readily available worldwide. Dual bearings are used at the dropout pivots for frame stiffness and additional c-clips lock the rocker bearings in place under torsional loads.

Tire Clearance
Ample clearance for mud and tires up to 2.6" width.

Press-in Headset
Our ZS56/ZS56 press in headset gives you the freedom to use reach adjust and angle adjust headsets for maximum adjustability.