Extralite Hyper JR + Quick Start Manual

H y p e r J R+

Features

Hyper JR offers unique features like low friction external OR and
lip seals, front engagement freewheel system, multishaped
oversized axle, top quality sealed ball bearings, Micro-Tuner
bearing preload system, "hart coat" anodized cassette body
and axle ends.
Bearings: 2x 6903 2RS (hub body) and 2X 6803 2RS (freewheel).
Use it proper care and its absolute performance will last for
years. This manual provides the informations needed for the set
up and the basic cleaning-lubing-maintenance.

Dimension for wheel building

Spoke hole Ø: 2.5mm
Right flange drilling Ø: 55.6mm
Disc flange drilling Ø: 55.6mm
Center to right flange: 23mm
Center to disc flange: 35mm

Lacing

See www.extralite.com to find spoke lengths.
Respect 28h or 32h lacing patterns (see drawings).
maximum spoke tension:
Drive side 130kgf
Disc side 90kgf

Bearing preload set-up:

Optimal bearing preload is important for a long bearing life.
Micro Tuner comes pre-adjusted from the factory. Do not
modify its position if not necessary.
Checking
Before modifying bearing preload carefully check the
complete wheel as follows:
1) Install wheel into dropouts and normally lock skewer.
2) Check there is no play at rim diameter.
3) Leave wheel free to completely stop spinning and carefully
control latest instants of movement. Stopping should be very
smooth.
Sealing HyperRear hub features low friction Lip Seal and external OR seals. However, since it is impossible to completely seal a
hub and still have it spin freely, with use water/moisture can get in.
Guideline Periodically clean hub internals (every 6-12 months in normal and dry conditions, every 3 months in wet conditions
and always before leaving the wheel un-used for more than 1 month) see Level1 instructions next page.
Never use high-pressure spray washing directly on hubs. Clean hubs externally with warm water and soap.
W ARNINg Un-correct greasing and/or maintenance of freewheel mechanism can lock and destroy it!
W ARNING Even small debris inside freewheel engagement can damage mechanism permanently.
W ARNING Water and moisture stagnant inside hub can permanently damage bearings.
Extralite products are warranted against defects in materials and/or workmanship for a period of two years from original date of purchase to the original o w n e r o n l y.
Any Extralite product that is returned and found by Studio Riva to be defective in materials and/or workmanship will be repaired or replaced at the sole discretion of Studio
Riva. This warranty is the sole and exclusive remedy. Studio Riva shall not be held liable for any indirect, special or consequential damages. The warranty is expressly limited
to repair or replacement of the product that has been returned and found to be defective by Studio Riva and are the sole remedy of the warranty. No credits or refunds
The warranty does not cover: normal wear, tear and fatigue; damage or failure due to accident or collision. Improper assembling, poor maintenance, alterations or
modifications, installation of parts not compatible with Extralite products void this warranty. Warranty does not cover damage arising from crash, abuse and/or misuse or
any other circumstances in which the product had been subjected to forces or loads beyond its design.
Improper use, modification and/or part changing, including surface finishing, could irreparably damage the component.
Extralite components are extremely performing and lightweight, crafted with very high quality, they request adequate installation and maintenance care. We strongly
Improper assembly and/or adjustment may significantly compromise strength and durability of the component causing serious personal injury.
Carefully check proper tightening torque of every bolt. Always respect installation recommendations.
Extralite components are designed for a specific use X-Country or Road or Downhill, respect product specific destination.

Extralite Limited Warranty

Immediately replace the component after crash and violent shock, or after continuos heavy use.
All labor charges for warranty service are responsibility of the product owner.
recommended that a professional bike shop install and service your Extralite components.
Note: the rider assumes all the risks regarding use and installation of Extralite components.
135mm / 142mm / XD Drive / Shimano
28H
Preload Tuning
If necessary fine tune as follows.
1) Install wheel into dropouts and normally lock skewer.
2) If you feel play at the rim turn in Micro-Tuner (clockwise). Use a
21mm wrench, very delicate torque and manners.
3) Unscrew Micro-Tuner for ca 1/4 of turn to release excessive preload
on bearing balls and achieve max rolling smoothness.
4) Repeat Preload Checking and eventually slightly correct it.
5) The optimal bearing preload cancels play at the rim without
affecting rolling smoothness.
Warning Incorrect bearing preload can bring to serious damages:
- Too tight --> bearings damage and premature wear
- Too loose -->permanent freewheel damage
will be issued.
INSTALLATION WARNING:
32H