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Comp Zeta GX Disc Wheels

Wheel Size
Cassette Body


While the Zeta GX wheels might be a newer product for Ritchey, one could argue their development has been in process for more than 50 years. Tom, often together with his mentor Jobst Brandt and other friends, has been blazing trails and riding rough stuff since the early 1970s. Riding dirt is literally in Tom's blood.

Directly inspired by the reliability, versatility and top performance of the original Ritchey Zeta wheels, the new Comp Zeta GX wheelset is designed to especially shine in the gravel. These hand-built wheels are tubeless-ready and feature forged disc hubs with sealed bearings and six-bolt rotor mounts – and a 4-pawl engagement system integrated with the freehub body. The rims offer a wide 25mm inner diameter, so they'll nicely fit wider tires for gravel, and they're laced with 28 sturdy spokes.

Tom Ritchey doesn't carry a mobile phone when he rides. Nor does he bother with the hassle of following GPS coordinates on a cycling computer. A firm believer in self-reliance, one of Tom's guiding design principals is that every Ritchey product needs to be reliable enough to get you home. Designed for durability and to perform in rough and rugged conditions in remote locations or close to home, and an incredible value for their price, the Comp Zeta GX wheels are built to be strong, dependable, and ready to rip, carve, and cruise through all your gravel adventures. And they’re reliable enough to make sure you can do it all again tomorrow.

  • Rims: 6066 alloy Tubeless Ready - OCR offset
  • Rim diameters: 650b and 700c
  • Rim depth: 19mm
  • Outer rim width: 29mm

Tech Specs

Rims6066 alloy Tubeless Ready - OCR offset
Rim diameters650b and 700c
Rim depth19mm
Outer rim width29mm
Inner rim width25mm
Suggested tire size range32-67mm
Hubsforged disc thru-axle hubs and sealed bearings 
Hub spacing100x12mm front / 142x12mm rear
Axle Compatibilitythru-axle (12-15mm) - standard quick release (conversion kits available separately)
Freewheel4-pawl engagement system
Freehub materialalloy
Freehub optionsShimano / SRAM XD-Road
CompatibilityShimano 9-11 speed and 12 speed road cassette - SRAM XD/XDR - Campagnolo 10-13 speed (freehub conversion kits available separately)
Disc brake compatibility6-Bolt
SpokesDT Industry 2.0 SG
Front28 spokes / 2x lacing 
Rear28 spokes / 2x lacing
Nipples2.0 brass 12mm
Weight1870g/set (650b) - 1996g/set (700c) - with rim strip installed
Do not use sealants containing ammonia

Logic Features

tubeless ready


All Ritchey wheels are tubeless-ready - just add tape, sealant, and a tubeless tire, and you're set!

OCR Rims

OCR Rims

Off-center spoke drilling offers equal spoke tension throughout the wheel resulting in an easily dished strong wheel.

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