UltraPulley from 9.8g/set
Minimize friction and mass
Weight: see table below
Sealing: low friction 2RS seals
Construction: twin-bearing system
Bearings: High Grade Stainless Ceramic Bearings
Material: self-lubing hi-tech polymer and AL7075 inserts
Compatibility: nearly every rear mech (see details on the table below)
Extremely well performing, weighing half of the competitors
Extralite Pulleys have been developed and continuosly evolved for over 15 years
Thanks to their unique engineering layout they provide the lowest resistance you can find today
Rolling smoothness is enhanced by custom super-low-friction stainless ceramic bearings featuring proper sealing too
Each pulley wheel features a twin-bearing assembly for unmatched stability and shifting precision
Pulley body and teeth are 3D machined from highly durable polymer that's well self-lubing too
Complete Kits
|
Model
|
Direct
replacement for
|
Upper
position
|
Lower
position
|
Weight
(set)
|
Manual
|
|
UltraPulley
11-11
|
Sram
Red / XO
Shimano Road 11/12s - MTB 10/11s Campa 10/11/12s |
11T
Not Phased *
|
11T
Not Phased *
|
9.8g
|
|
|
UltraPulley
12-12
|
Di2**
and Shimano road 12/11/10s
Sram Road AXS 11/12s Campa 12s |
12T
Not Phased *
|
12T
Not Phased *
|
12.4g
|
|
|
UltraPulley
13-13
|
Shimano
MTB XTR-XT 12s
|
13T
Not Phased *
|
13T
Not Phased *
|
14.6g
|
|
|
UltraPulley
12-12 PH
|
Sram
XX1-XO1-XLPR-GX
11s
|
12T
Phased *
|
12T
Phased *
|
12.2g
|
|
|
UltraPulley
12-14 PH
|
Sram
XX1-XO1-GX Eagle 12s
|
12T
Phased
|
14T
Phased
|
14.0g
|
|
|
UltraPulley
14-16 PH
|
Sram
XX1-XO1-GX Eagle 12s
|
14T
Phased
|
16T
Phased
|
16.2g
|
|
|
UltraPulley
14-16 PHB
|
2025-'24-'23
AXS
Eagle XX SL-XX-XO-XX1-XO1
|
14TB
Phased AXS
|
16TB
Phased AXS
|
16.2g
|
Manual(*) Interchangeable
for upper or lower position
(**)
Installation Bolts
All
UltraPulley
models are equipped with a twin-bearing system and their width at the bolt
fitting is 8.4mm
Their fitting into derailleur cages proved to be fine on any common setup,
only in few cases
(listed below) are required longer bolts
Check your setup before ordering and eventually use Extralite bolts (or equivalent)
to achieve a perfect installation
- Di2 12s requires
2 ExtraBolt 12.2C or equivalent M5x15.5mm bolts
- AXS
road requires 1 ExtraBolt 12.2C or an equivalent M5x15.5mm bolt
- AXS mtb/gravel require ExtraBolt 12.2B + 12.2C or equivalent M5x14 + M5x15.5mm
bolts
ExtraBolt
12.2 are specifically
designed
for derailleur pulleys and
are available in 3 different lengths
ExtraBolt 12.1 are less specific but very versatile and can generally
offer
a good fitting too
Note: some Sram models employe a steel M4 bolt at the top pulley position, despite its smaller diameter it fits UltraPulley without issues
Chain
Compatibility
UltraPulley
fit all chains currently on the market
The only exception is for
the Sram MTB AXS (Eagle
XX SL-XX-XO AXS from 2023)
chain that requires
the specific UltraPulley 14-16 PHB
Custom
Setups - Cage
Fitting
Here
how to check
the clearance of your cage to install wider pulleys
Measure your derailleur cage from the center of pulley bolt to the inner edges
of the cage
The table below reports the max diameter for each pulley model (with the chain
installed)
Then compare your cage clearance with half of the pulley diameter listed on
the table (diameters include chain)
|
Model
|
Position
|
Diameter
( with chain )
|
Thickness
at bolt fitting
|
Weight
|
|
UltraPulley
11
|
Upper
and/or Lower
|
54mm
|
8.4mm
|
4.9g
|
|
UltraPulley
12
|
Upper
and/or Lower
|
58mm
|
8.4mm
|
6.2g
|
|
UltraPulley
13
|
Upper
and/or Lower
|
62mm
|
8.4mm
|
7.3g
|
|
UltraPulley
12PH
|
Upper
and/or Lower
(Phased)
|
58mm
|
8.4mm
|
6.6g
|
|
UltraPulley
14PH
|
Upper
and/or Lower
(Phased)
|
66mm
|
8.4mm
|
7.4g
|
|
UltraPulley
16PH
|
Lower
(Phased)
|
74mm
|
8.4mm
|
8.8g
|
Tuning
Tips
Originally
phased-pulleys were born to help guiding the chain on MTB single chainring
systems but can fit road systems too
Pulleys
with phased teeth (PH) can be applied also on double chainring systems with
the benefit of a higher shifting precision
Most
derailleur cages can fit pulleys with one or more teeth than the original
However
each setup differs slightly so you always have to analyze it specifically
As
example Dura Ace 11/12s have been positively tested also with 13-13T, 12-12PH
and 12-14PH
If you plan
to fit UltraPulley 12PH in the upper position note that it behaves differently
and more precisely than, as example, a regular 12T
UltraPulley 13T is not phased however the wider diameter keeps the upper pulley
a bit closer to cogs and that may add precision in some setups too
The possible
improvements are part of your personal tuning process and taste, no written
rules to project your ideal setup
Highly
Stabe Rotation System
All UltraPulley models feature the most advanced
spinning system currently in use
The system is based on 2 paired-micro-ceramic-bearings on each pulley instead
of one-big-bearing per pulley as most others
Which
are the advantages?
Two
paired bearings on each pulley stabilize the lateral play and virtually eliminate
any left-to-right play, similarly to a front wheel-hub
Note that a single-bearing pulley can't even get close to this level of lateral
stability
Friction
minimization
Apparently two bearings could increase the overall friction but actually that's
not the case
Thanks to the vastly improved rotating geometry described above the bearing
size can be minimized
The smaller difference between inner and outer races reduces ball rotation
friction way under the 50% of what is generated by one single-big-bearing
HyperCeramic bearings further enhance the quality of UltraPulley rotating
system allowing the lowest friction factor of the whole bike-tuning industry
Besides being corrosion resistant HyperCeramic bearings are protected from
external elements by proper low-friction 2RS seals too
100% made in Italy