Steel trail hardtail frame for technical trails, long rides and demanding off-road use. Designed around a 120 mm suspension fork and compatible with both 27.5 and 29" wheels, the Ultra offers more capability on rough terrain than the P-29er while remaining a simple and durable platform for custom builds.
Looking to build a complete bike setup (cockpit, wheels and components)?
We can help you create a setup that fits your real use, with the option to include compatible Ritchey components for a consistent build.
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Ritchey Ultra Frame
The RitcheyUltra is a steel hardtail frame designed for trail riding, real-world off-road, aggressive cross-country and all-mountain use, featuring modern geometry and a 120 mm suspension fork platform. It is a versatile, purpose-built chassis compatible with both 27.5" and 29" wheels, as well as 1x and 2x drivetrains, while maintaining a clean and functional design.
The Ultra is conceived as a versatile hardtail for riders who want a solid, predictable bike for long rides, varied terrain and custom builds, without chasing short-lived trends.
Construction highlights
WCS Logic Tubing The frame is built using Ritchey’s proprietary WCS Logic steel tubing, triple-butted and heat-treated, developed specifically for the TIG welding process to Tom Ritchey’s specifications. The construction combines strength, ride quality and long-term durability while preserving the lively, compliant ride feel that defines Ritchey Logic tubing.
Technical trails and real-world use
The Ritchey Ultra is a true trail hardtail. Its geometry, 120 mm suspension fork, dropper post compatibility and ability to run either 29" or 27.5+ wheels make it well suited to singletrack, technical trails and lightweight trail bikepacking.
It is a purpose-built platform for routes where maintaining the control and handling characteristics of a mountain bike remains essential, even on long days in the saddle or when carrying a lightweight bikepacking setup.
External cable routing; dedicated internal routing for stealth dropper post
Bottle cage mounts
Two; size S features a single mount on the down tube
Rack mounts
Not specified
Fender mounts
Not specified
Derailleur hanger
Replaceable stainless steel
27.5" wheel and tire compatibility
Recommended: 27.5 × 2.4" · Maximum: 27.5 × 2.8"
29" wheel and tire compatibility
Recommended: 29 × 2.25" · Maximum: 29 × 2.4"
Frame weight
2,380 g (size M / 17")
Colour
Honey Mustard
FORK
Item
Specification
Recommended fork
120 mm BOOST suspension fork
Rigid alternative
500 mm axle-to-crown rigid fork
WHEEL & TIRE COMPATIBILITY
Item
Specification
27.5"
27.5x2.4 recommended (2.8 max)
29"
29x2.25 recommended (2.4 max)
Note
Actual tyre size varies by rim and tyre manufacturer
BRAKE COMPATIBILITY
Item
Specification
Standard
Rear post-mount
Rotor size
160 mm
Max rotor
180 mm with adaptor (sold separately)
DETAILS
Item
Specification
Sizes
S (15") / M (17") / L (19") / XL (20.5")
Weight
2,380 g (size M / 17")
Colour
Honey Mustard
Size guide (manufacturer reference)
The following sizing is provided by Ritchey and should be considered a general guideline. Final size choice depends on individual proportions, riding style and intended use.
S: 157–170 cm
M: 168–178 cm
L: 175–186 cm
XL: 183–191 cm
At Bikejamming we offer dedicated sizing and build consultation. Share your height and inseam and we will reply within 24 hours.
Questions and Answers about the Ritchey Ultra
What’s the difference compared to the P-29er?
The Ultra is more trail-oriented: it’s designed around a 120 mm fork, offers more capability on rough terrain, and allows for a wider range of setups.
Is it an adventure frame?
First and foremost, it is a trail hardtail. While it can be configured for lightweight trail bikepacking and self-supported adventures, it is not designed as an expedition or touring bike.
Can I run 27.5 or 29 wheels?
Yes, it supports both, with different setup approaches.
What tire clearance does it support?
Up to 27.5×2.8 or 29×2.4 max.
Is 1x or 2x better?
Both are possible, but 2x requires Shimano Side Swing and is limited to 11-speed only.
Is it suitable for long-distance travel?
It can be used for lightweight trail bikepacking with bags mounted directly to the frame, handlebar and seatpost. For rack-based touring, heavier loads or extended self-supported travel, a purpose-built touring or expedition platform is the better choice.
Spare parts, headsets and build support
With frame purchase we provide access to:
original Ritchey spare parts
compatible Ritchey headsets
support for fork choice, drivetrain compatibility and full build planning
The Ritchey Ultra is designed around either a 120 mm Boost suspension fork or a rigid fork with a 500 mm axle-to-crown length. When converting to a rigid fork, steerer type, 15 × 110 mm Boost axle standard, brake mount and fork offset should also be verified for compatibility.
For Trail Adventure builds, technical bikepacking and off-road touring, we have selected three compatible forks, each with distinct characteristics.:
SEIDO TAZA → A carbon Trail Adventure fork with a 510 mm axle-to-crown length and a 51 mm offset. It is fully compatible but raises the front end slightly compared with Ritchey's 500 mm reference geometry, favouring stability, load-carrying capability and demanding off-road travel.
RITCHEY WCS Carbon BOOST Mountain → A carbon fork with a 502 mm axle-to-crown length and a 45 mm offset. It maintains virtually the same front-end height while providing slightly more stable handling, making it well suited to lightweight, performance-oriented builds.
SEIDO BPS → A 500 mm axle-to-crown steel expedition fork with a 51 mm offset. It most closely replicates the geometry specified by Ritchey while adding cargo mounts, low-rider compatibility and a high load capacity.
The best choice depends on the desired handling characteristics, the expected load and the intended front wheel configuration.
Not sure about real-world compatibility with your wheels, brakes, or overall geometry? Get in touch before purchasing—we’ll help you validate the setup.
Why buy from Bikejamming
Tracked shipping
Bilingual support (Italian / English)
Fast, clear responses
Real pre-purchase consultation on sizing and setup
If you would like to check compatibility or plan a build that truly matches your riding style, we are here to help.
Iconic routes & real-world use
This frameset can be configured for long, vibration-heavy off-road routes. For a detailed explanation of bike choice criteria on a real-world route, see our guide: Baja Divide: which bike to choose
Brand
Reference
97452007027
Condition
New
UPC
796941974547
Primary Terrain
Technical Off-Road
Cargo Mounts
No Rack Mounts
Frame Material
Steel
Tire Compatibility
Plus (≥ 2.8")
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