Innovation in style, engineering and security. The new SIP tubeless rim, successful and reliable. This rim allows you to use tires without a tube. In case of a puncture a sudden air leak will be prevented, the air pressure will decrease slowly. Blown tires will be a thing of the past. So will valve tear offs or punctures due to tubes beeing trapped between the rims during assembly.
The SIP tubeless rim combines the advantages of a classic cast rim with a high production accuracy and quality. The design is a tubeless double hump rim. This hump prevents the tire from slipping into the rim well in case of a puncture. The rim rotation is very precise. The rim is aluminium cast and CNC machined. The surface finish is perfect. The valve is included and already mounted.
The rim is currently available in polished aluminium, black, black with polished edge and silver.
2.50-10: Perfect size for 100`80 and 100`90 tires. Compared to a 2.10 inch rim the SIP rim will cause a minimal and therefore insignificant misalignment towards left side. If the rim is used on front and rear wheel, there is no misalignment. Then there is only a minimal eccentricity. The rim allows fitting tires from 3.00/ 3.50 up to 100/90-10.
The rim fits on all 10 "brake drums, including PX`98 star brake drums and GRIMECA disc brake drums. The ABUS lock fits perfect on this present series
SIP has been successfully verified by the German ministry of transport and is now officially recognized as approved vehicle component manufacturer. The SIP brake caliper has also received official type-approval. From February 2015 on, the rims SIP 8101 got the German KBA number 50163. They managed all the necessary tests for a legal road-use on German roads. For sure, this will help also to legalize it in other countries. This compatibility regulation applies for the front and rear for Vespa Cosa models. Vespa PX models require a 2.10 sized front wheel to be fitted to also enjoy this advantage. The chromed version comes without KBA number. There we plan no homologation yet.
Conclusion: innovative rim, high-quality workmanship, additional security. This product has successfully passed our long distance and fatigue test!
Aluminium rim, painted, 10x 2.50 inch, tubeless
- acorn nuts, wrench size of 12mm (0,472 inches), and with NORD-Lock washers
- long valves. The short ones cause problems on some old english petrol stations.
- German ABE papers (except the chromed version) and mounting instruction
SIP-TIP: keep some tire sealant in your glove box.
Attention: Please contact a qualified workshop for accurate and damage-free tyre fitting (tire tool and appropriate fitting basis highly recommended). By all means make sure to avoid any damage to the surface! A lot of tube-type (TT) tyres can also be used as tube-less (TL) tyres. When mounting the tyre, make sure to use mounting paste. If you use oil or other inappropriate lubricants, the tire won’t sit firmly on the rim. Danger! Make sure to always check clearance of engine and accessory parts!
Jochen Undesser aka "Undi", 09/2009:
"My team rider Christan Rapf #41 has tested the tubeless rim very successfully in the last race! He is now overall 2nd place in class 2 of the ESC. Tire pressure was at 1.5bar (21.8psi).Rotation and radial run out were both perfect! All of the ESC boys that are constantly having problems with flat tires consider these rims an awesome idea!"
Mike Betz, GSF, 05/2010:
"fantastic, problem free installation with the normal tire mounting tool, the high quality workmanship of the rim and the exact fit. Weight is also great, normal tire sets are much heavier. A win win situation from the security aspect due to going tubeless. I don't expect to have any flats this year, cause all three sets of tires have been converted to tubeless ;-)"
Here is the SIP Tutorial Video how to install a SIP tubeless rim:
More Videos, also in English: