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)
Extralite Pulleys have been developed and continuosly evolved for over 15 years
Extremely lightweight and performing, weighing half of the competitors
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 11/12s
Sram Road AXS 11/12s Campa 12s |
12T
Not Phased *
|
12T
Not Phased *
|
12.4g
|
|
|
UltraPulley
13-13
|
Shimano
MTB XRT-XT 12s
|
13T
Not Phased *
|
13T
Not Phased *
|
14.6g
|
|
|
UltraPulley
12-12 PH
|
Sram
XX1-XO1-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
|
Eagle
XX SL-XX-XO AXS 2023
|
14TB
Phased AXS
|
16TB
Phased AXS
|
16.2g
|
Manual* Interchangeable
for upper or lower position
** Di2 12s requires ExtraBolt 12.2C or equivalent M5x15.5mm bolts
Pulley
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
however in some cases it may require a different bolt length than the original
We always suggest to check well your setup before ordering and eventually
use the the following Extralite bolts (or equivalent)
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
Single
Pulleys for Custom Setups
|
Model
|
Position
|
Diameter
( with chain )
|
Thickness
at bolt fitting
|
Weight
|
Manual
|
|
UltraPulley
11T
|
Upper
and/or Lower
|
54mm
|
8.4mm
|
4.9g
|
|
|
UltraPulley
12T
|
Upper
and/or Lower
|
58mm
|
8.4mm
|
6.2g
|
|
|
UltraPulley
13T
|
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
Phased pulleys
were born to help guiding the chain on MTB single chainring systems and can
fit road systems too
Pulleys
with phased teeth (PH) can be applied also on standard 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 has been positively tested with 12-12PH , 12-14PH
and 13-13
How to check
the clearance of your cage at each pulley
Measure the distance from the center of pulley bolt to the inner edges of
your derailleur cage
The table above reports the max diameter for each pulley model with chain
installed
Divide by 2 the pulley diameter (with chain) and compare the result with your
cage clearance
If you plan
to fit UltraPulley 12PH in the upper position note that it behaves differently
and more precisely than 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 kind of
possible improvements are part of your personal tuning process and taste,
no written rules to project your ideal setup
Stability
and Friction of the 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
Our custom-made High Grade Hybrid Ceramic bearings further enhance the quality
of UltraPulley rotating system, allowing the lowest friction factor of the
whole bike-tuning industry
All that with the proper protection of low-friction 2RS seals and the advantage
of non-rustable stainless bearings too
100% made in Italy