Rider weight / General
All our products exceed Uni/Din safety standard requirements.
As a general rule Uni/Din safety standards and tests consider 90kg. (200Lb.) as rider weight and simulate the
efforts of an extremely strong world-class athlete as standard reference.

Are you that strong?
If yes plan to replace your frame/component after a whole racing season since you can have partially fatigued it.
An average good racer outputs 20% lower loads and this doubles at least the component fatigue life.
The loads applied by an average rider affect only marginally the fatigue life of the component.

Rider weight / Wheels
Rider weight doesn't play the main role in the energy q.ty count that can be applied to the bike components.
1) Speed itself increases by the square of the loads applied to the front wheel when hitting an obstacle.
Therefore speed, terrain and the correct pressure of the front tire are the most critical factors.
2) Personal riding and sprinting style can put very limited or extremely high loads on the spoke-rim structure of a rear wheel.
Here key factors are bike/rider lateral angle under sprinting, leg impulsive force and gear ratio.
3) Low gear ratios increase chain pull and this directly increases the mechanical stress on hub freewheel, hub bearings, crank bearings etc.

Carbon Road Rims/General
Carbon fiber rims offer very high stiffness/weight ratio but can't absorb impacts and can't get deformed or bent as alloy rims.
Always remind that Carbon fiber rims are typically sensible to impacts and heat.
Thereafter, despite the extremely careful engineering, all road wheels equipped with lightweight carbon fiber rims should be used only on well paved roads and with proper riding ability.
Never leave carbon wheels exposed to direct strong sunlight for long time nor stored in the car under a hot sun.
In case of rim-brake systems:
- brake shoes should always be carbon friendly and of good quality.
- periodically clean/degrease the surface of rim races with acetone, this maximizes braking performance and reduces rim wear.
Additionally, during long descents, use short strong braking and avoid long mild slow downs.
This allows longer cooling periods between braking sequences and prevents permanent deformations of the rim due to excessive heating.

Carbon MTB Rims / General
Carbon fiber rims offer very high stiffness/weight ratio but can't absorb impacts nor can't get deformed or bent as alloy rims.
X-C Carbon rims are typically over dimensioned especially at their outer edges since the composite material is very sensible to impacts with sharp objects.
Thereafter, despite our very careful engineering, driving ability, tire pressure and suspension setup are the most relevant factors that will condition the rim durability.

Always remind that Carbon fiber rims are typically sensible to impacts and heat.
Never leave carbon wheels exposed to direct strong sunlight for long time or stored in the car under a hot sun.

Road tire installation / tubeless / hokless

SAFETY note for Clincher Rims.
Tape/Flap Thickness on both Tubeless & Classic Tube assemblies.

Road clinchers tire manufacturers haven’t reached a common standard of wire-beading / tubeless diameter yet.
Thereafter any kind of tire assembly requires a certain thickness of sealant Tape (or protective flap).
The tape thickness (or flap thickness) plays an extremely important role on keeping the tire safely onto the rim.
Tape application and tire installation should be carefully executed by a professional mechanic who has to evaluate if
that specific tire model fits correctly onto the rim bead and eventually has to tune properly the tape thickness.
A loose tire can get off the rim while riding whilst a too tight tire is extremely difficult to be installed
The correct combination depends on the correct tape thickness that optimizes final bead diameter of the rim for the inner diameter of that specific tire.
These concepts are a good rule for any type of road tire assembly and especially for hookless rim models.

Tubular tire installation / removal
Both installing and removing tubulars require very good skills.
Removal shluod be donevery carefully to avoid possible rim damages
and de-lamination.

Installation requires specific contact glue or specific tape, the operation should be done by an expert technician.

Wheel Servicing

Spoke replacement

Hub maintenance
Please refer to the manual instruction of your specific hub/wheel model.


Elder models: ExtraDisc, ExtraDisc v2.0 , ExtraDisc UL, ExtraTerra, ExtraTerra UL, ExtraRoad SL, ExtraClimbSLC.

Hub opening without messing up "micro tuner" setting

Remove right axle end using a 5mm allen wrench.
In case left axle end unscrews first, remove it and insert a 10mm allen key into axle. Re-assemble left axle. Pull out freewheel body.
Push axle from right to left side.
As left bearing pops out avoid any movement of the internal preload tuner (mark its position with the axle, use a permanent pencil)
Unscrew axle and left axle end, then remove bearing.

In case you have lost original bearing tuner setting use as starting position (left to right bearing distance on axle fittings ):
ExtraDisc: 43.95mm
ExtraTerra / ExtraRoad SL: 43.75mm
ExtraRoad SLC: 43.80mm

Axle micro tuner setting (internal)
Insert axle into hub-shell, insert left bearing into hub-body.
Warning: do not push bearing pressing on its inner race. Proper bearing insertion requires pressure on the outer race only.
Tighten left axle-end, insert freewheel (without pawls), and then tighten right axle end.
Try rotating the wheel, checking for smoothness and play (with a tightened quick release).
If necessary adjust bearing tuner again (shorten bearing distance if you wish to reduce play, lengthen to increase smoothness)
Bearing axial tuning involves axle length variations of +/- 0.05mm max, that means 1/10th of a turn of the micro tuner device (thread is counter-clockwise).
The adjustment procedure is simpler than it sounds, once you have done it a few times.
Partially insert freewheel (with pawls), check for correct pawls positioning/engagement, insert freewheel, tighten right axle end. Done!