dimanche 13 mars 2016

Accessoire - tubeless kit

Les offres commencent à arriver.

L'idée est de mettre une valve tubeless et un scotch afin de sceller la jante.

Pour la roue arrière, pas de problème elle a le rebords mais la roue avant ...


It feels better without tube!  The total number of sales has reached 10,000 sets!

This product is Front & Rear Set for CRF1000L Africa Twin / DID Rim.
Rim Size: Front 21×2.15 & Rear 18×4.00 MT.
Tape Width: Front 34mm and Rear 51mm.
Part Number: FR21214.
English Instruction Manual.
"Features of the OUTEX clear tubeless kits"

1. Greatly reduced risk of blowouts
2. Improved handling, less unsprung weight
3. Race proven and popular with many factory riders in Japan
4. Easy application and durable construction
5. Tyre changes made quick and easy
6. Specialised, clear, triple layer construction
7. Easily repairable in the event of a snapped spoke

La réponse pour les jantes sans Hump

In general, the role of a hump is to restrain the tire bead part in order to avoid bead drop when air leaves the tire, but as seen in the image below, if the air pressure is such that normal driving is possible, the bead part does not directly touch the hump, meaning that in the end the tire and wheel are joined together due to air pressure.

The weight of the bike + the body weight of the rider + the traction while driving cause the internal pressure of the tire to increase, and the beads become less likely to drop the more the tire is pressed against the road surface and flattened.

As you can see in the image below, during cornering the wheel is weighted by centrifugal force on the outside, maintaining the tire's grip, meaning that the rim is pressing the bead part of the tire in the direction of the white arrow.

The rim is pulling the side wall, and the side wall does not stretch, so the outside bead part is not burdened due to the deformation of the tire tread shape.

This driving image is from the Tsukuba Circuit, and the tire incorporates an OUTEX tubeless kit.
The air pressure at this time is set at 1.2kPa (17psi) cold, and the results of the race were a win and the establishment of a course record.

Un avertissement pour l'installation du pneu pour la première fois:

Assembly method for tires with WM-type rims

The fact that the OUTEX tubeless kit can also be used with WM-type rims without any problems has become well-known, and recently it has become common-place for adventure-type (KTM990 ADVENTURE or CRF1000L Africa Twin / etc.) front 21-inch rims to be changed to tubeless as well.

However, caution is required when assembling the tire after executing the kit, because if you attempt to insert the tire with all your strength using a tire iron in some cases the protective seal which is not yet stuck tightly may peel off.

When assembling the tire you must be careful to make sure that the tire's bead part does not hang on the protective sheet.

It is important that the tire bead on the side opposite the side you are attempting to inlay the tire into with a tire iron is set into the center of the rim, so when doing the work alone, if you either insert the tire using screw clamps as in the following image, or use a large clamping band to prevent the tire bead from opening, it is possible to inlay the tire easily without damaging the protective sheet.

Attempting to force the tire together with the bead of one side of the tire off center from the rim will result in damage to the protective sheet.

By putting air in the tire after assembling it with tire bead in the center of the rim the protective sheet will be set into position into the bead of the rim while pressing the protective sheet into the rim ↓

The next time the tire is changed, the internal pressure will cause the protective sheet to adhere firmly, so the tire can be changed as normal.

But you should still please use bead cream.


Un autre fabricant: http://www.bartubeless.it/en

4 années de garantie. Transformation à faire chez eux. Pas de prix indiqué


2 commentaires:

  1. ciao, as tubeless system please take a look to italian Bartubeless too.
    I installed it and made an article (you can translate with chrome)
    or refer to maker's site

    1. Merci pour l'information. Je l'ai intégrée ici et j'ai aussi fait un article spécial. Une idée du prix?

      Bonne route