
G27 650B
The 650B gravel specialist that’s made for multi-day bikepacking routes, singletrack adventures, and everything in between.
• Intended Use: Gravel
• Inner rim width: 27mm
• Recommended Tire Size: 42c – 2.25″
• Tubeless Optimized; Tube Compatible
• Starting at $2,550
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- Descending
- Climbing
- Impact Toughness
- Compliance






The fire-road descent is where we felt the G27’s unique design come into play the most… they gobbled up the roots and spit out the rocks.
– road bike action
from the journal
BIG TIRES FOR BIG SMILES
Those seeking the thrill of drop-bar riding over technical terrain that is typically frequented by mountain bikes will benefit from the air volume, durability, and anti-flat performance benefits provided by the G27. If your path leads you to rough roads, single tracks, and multi-day bike packing adventures – the G27 is for you.
Gravel riding shouldn’t be confined to one wheel size. For maximum control, it’s got to be 650b.
WITH SMALL WHEELS AND BIG TIRES, THE G27 PROVIDES THE MOST DESCENDING CAPABILITY ON A DROP BAR BIKE.
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The G27 is the ultimate gravel component, capable of transforming any drop bar bike into an off-road capable rig. When 650B wheels are paired with larger volume tires, the actual diameter of the outside of the tire is close to a 700c wheel with a smaller tire. This means frame geometry stays consistent between wheel sizes, but the 650B wheel adds with more tire and therefore lower tire pressures. This makes a drop-bar 700c bike more confidence-inspiring over rough terrain.
THE WIDEST (AND LIGHTEST) GRAVEL WHEEL
The G27 is the widest, and also the lightest, road/gravel wheel we make. At 320g per rim, built wheelsets can be as low as 1257 grams. Paired with a generous 27mm width, these lightweights can be paired with wider tires to create a wheel system that’s equal or lighter in weight to other wheels, while being stronger, quicker and more capable.
GET LOW
Designed to be run with tires between 42c and 2.25”, in pressures as low as 20 PSI, the G27 was made to run low. Low pressures means fewer flats, more control, and surprising to some, lower rolling resistance.
ANTI-FLAT TECHNOLOGY
ENVE’s Wide Hookless Bead technology makes the G27 extremely resistant to pinch flats. When the tire is bottomed out against the rim in a hard impact, the force is spread over a wider area, decreasing the likelihood of a flat. This contributes to the G27’s prowess as an off road weapon. SUPPORT
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Reviews
Product Specs
BUILD options
Hub Offerings | Chris King R45D, ENVE Alloy, Industry Nine Torch Classic |
Spacing | Front: 15×100, 12×100, Quick Release | Rear: 12×142, Quick Release |
Wheelsize | 650b |
Pricing | ENVE Alloy: $2,550 Industry Nine Torch Classic: $2,550 Chris King ISO: $3,000 |
Brake Types | Disc Brake Centerlock (Lockrings not included) |
dimensions
FRONT | REAR | |
---|---|---|
Rim Depth | 25mm | 25mm |
External Width | 35.5mm | 35.5mm |
Internal Width | 27mm | 27mm |
Hole Count | 24 | 24 |
Effective Rim Diameter | 571mm | 571mm |
Accepted Tire Sizes | 42c – 2.25″ | 42c – 2.25″ |

Weights
FRONT | REAR | WHEELSET | |
---|---|---|---|
Rim Weight | 320g | 320g | 640g |
ENVE Alloy | 575g | 699g | 1275g |
i9 Torch Road CL | 558g | 698g | 1257g |
Chris King R45 CL | 587g | 703g | 1289g |