MARC MOSS Posted April 9, 2015 Share Posted April 9, 2015 So today I fitted my 16" volks to my dc2, with the brakes being 320x30mm and the calipers being 6 pots the wheels literally only just fit over the calipers with around a 2mm gap between them and the spokes and the inside of the wheel... Now I've run things close for years but am I taking the piss? Do calipers or could calipers physically grow with heat for it for it to be an issue? I know things are built to tight tolerance's and all but it's super close lol Quote Link to post Share on other sites
WallaceGlanza Posted April 9, 2015 Share Posted April 9, 2015 Wheels do flex slightly, especially since you do a lot of track work may be safest to run some thin spacers. Quote Link to post Share on other sites
_shaun_ Posted April 9, 2015 Share Posted April 9, 2015 I run 2mm spacers on mine just for some peace of mind my d2s are extremely close to day the least Quote Link to post Share on other sites
MARC MOSS Posted April 9, 2015 Author Share Posted April 9, 2015 Wheels do flex slightly, especially since you do a lot of track work may be safest to run some thin spacers.Im more concerned about if they expand at all when they get hot like most things do, I'm already on a 10mm hubcentric at the mo lol I may have to go 12mm Quote Link to post Share on other sites
Keri-WMS Posted April 10, 2015 Share Posted April 10, 2015 The two main changes are the outer half of the caliper moving closer to the spokes due to flex when you stand on the pedal (can be tested with the car at-rest), the main thing that expands with heat is the disc itself - as long as it's got room in the caliper to do that it won't be an issue. Quote Link to post Share on other sites
Idrees Posted April 10, 2015 Share Posted April 10, 2015 Get some bigger spacers Marc. I had a bit of a disaster at JF2 where the calipers expanded causing them to grind against the wheels. Both front wheels (freshly refurbished Advan RG's) are now scrap. Quote Link to post Share on other sites
Keri-WMS Posted April 10, 2015 Share Posted April 10, 2015 Ouch! We normally reckon on a (measured) 2mm being the safe minimum assuming the wheel bearings are ok etc - how close were yours before they touched if you happen to know? Quote Link to post Share on other sites
Bluebear Posted April 10, 2015 Share Posted April 10, 2015 Maybe I need some spacers on my 14" Volks then... Practically touching the standard calipers!I've given them abuse on the road and never had a problem though. Quote Link to post Share on other sites
Keri-WMS Posted April 10, 2015 Share Posted April 10, 2015 Worth noting that standard calipers are pulled away from the wheel under braking whereas 4-pots flex towards the wheel (not by much or course!!!!). BUT - a standard sliding caliper with old pads will be further from the wheel, the time to REALLY check is when fitting new pads! Quote Link to post Share on other sites
Idrees Posted April 10, 2015 Share Posted April 10, 2015 I didn't measure accurately, but they were very close. Possibly less than 2mm. Quote Link to post Share on other sites
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