You want to mount bigger tyres on the R100 GS, such as MICHELIN DESERT when going on longer off-road trips. But the swingarm and the spring strut do not allow clearance for bigger tyres. Our wheel spacer provides an economical solution for the temporary offroad use of bigger tyres. A 5mm offset in the the spokes can be adjusted too but this is perhaps too expensive for a temporary situation.The wheel spacer is made from aluminium and comes supplied with long screws. WARNING: spacers may not be street legal, for this reason we recommend it for OFF-ROAD USE only. Your rear wheel will track 5mm to the left of the front wheel. 5mm is not generally noticeable when driving off-road and the spacer has been tested on many tours through Africa.