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Ultra Frame

Size
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Description

If there’s one thing Tom knows, it’s dirt. When he first designed the Ultra he knew it would appeal to riders who demand specific ride characteristics and dirt slaying only he could deliver- and that was in the 1980s! Good design withstands the test of time, and the latest iteration of the Ultra is a prime example. Like its predecessor from 30 years prior, the new Ultra occupies a unique ride space from cross-country riders looking to get rowdy and go big to enduro riders lusting for some all-mountain shredding.
 
Designed around a 120mm travel fork and super stable Boost 148 spacing, most of the fun is in the wheels. Designed to accommodate 29" or 27.5" wheels, the Ultra is highly versatile. Throw on some 29s for some trail-smashing XC riding, or saddle up some 27.5+ for some serious no-holds-barred shredding. The Ultra is a rough and rugged trail master that doesn’t know when to quit.

  • Compatible with 27.5 x 2.8 and 29 x 2.4 tires
  • Internal routing for a dropper post
  • Boost 148x12 rear spacing

Tech Specs

Materialheat-treated, triple-butted Ritchey Logic steel tubing - TIG welded
Ultra-light forged and machined tapered head tube
Electrophoretic Deposition (ED Coat) treated for corrosion resistance
HeadsetWCS headset included (upper IS42/28.6 | lower IS52/40)
Headset upper bearing41.8mm OD / IS42/28.6 (S.H.I.S.)
Headset lower bearing51.9mm OD / IS52/40 (S.H.I.S.)
Seat tube clamp size33.1mm (2.5Nm max for derailleur clamps and chain guides)
30.9mm seat tube with stealth dropper routing and replaceable seat collar
Bottom bracket73mm - English threaded
Crankset maximum ring size38T single - 26/36T double 
Designed for 1X or 2X chainrings (Side Swing front derailleur required for double)
Chainline52mm
Not compatible with Direct Mount standard and related components (T-Type derailleurs and cassettes)
Recommended tire size27.5x2.4 (2.8 max) or 29x2.25 (2.4 max) - tire size varies by rim and tire manufacturer
Post-mount rear brake160mm (180mm max - adaptors available separately)
Bottle cage mountsTwo (one on downtube and one on seat tube) *Note: size small frames include only a downtube bottle cage mount
SizesS (15") / M (17") / L (19") / XL (20.5")
Weight2,380g (M/17")
ColorHoney Mustard
BOOST 148mm spacing (12mm alloy thru-axle included)
Optimized for 120mm (BOOST) suspension travel fork or 500mm axle-crown rigid fork
External cable routing
Replaceable stainless-steel derailleur hanger

Logic Features

WCS Logic Tubing

WCS Logic Tubing

Ritchey's proprietary and triple-butted steel tubing developed specifically for the TIG welding process to Tom's specifications.

Geometry

  • Design
  • Design
Frame Size
S
M
L
XL
A
Top tube (effective)
591
606
628
644
B
Top tube (actual)
580
588
605
623
C
Seat tube (c-t)
390
432
475
515
D
Seat tube angle
74°
74°
73.5°
73.5°
E
Head tube length
100
105
110
120
F
Head tube angle
68°
68.5°
68.5°
68.5°
G
BB drop
58
58
58
58
H
Chainstay
439
439
439
439
I
Wheelbase
1128
1138
1155
1174
J
Standover height
742
771
800
827
K
Stack
606
613
617
627
L
Reach
417
430
445
460
M
Fork rake
51
51
51
51
Post diameter
30.9
30.9
30.9
30.9

Tech Manuals / Spare parts / Videos / Downloads

Drawings / Manuals / Guides

Spare Parts

Compatible Headsets

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