monsterchub Posted November 8, 2017 Share Posted November 8, 2017 Hi All, I recently done a trackday and decided to swap my standard caterham wheels with tread tyres & replaced with wheller steel wheels with zz's tyres for more grip. The sprigots in the wheel centres were oversize so when tightened all the load was taken purly on the bolts as they didnt seat properley. I was told that this was unsafe to drive in anger. What are anybodys thoughts? Link to comment Share on other sites More sharing options...
SM25T Posted November 8, 2017 Share Posted November 8, 2017 You must locate the wheel centre hole on the hub protrusion. This carries the load. If the hole is too big ... Do not use the wheels ! Link to comment Share on other sites More sharing options...
monsterchub Posted November 8, 2017 Author Share Posted November 8, 2017 I put the caterham ones back on for the rest of the day, but noticed that even they were not a snug fit !!Looks like I will have to give weller a call and get new sprigots made up. Link to comment Share on other sites More sharing options...
ScottR400D Posted November 9, 2017 Share Posted November 9, 2017 I'm not sure the answer you've been given is correct. As I understand it the wheels are fixed by the friction against the face of the hub created by the clamping load of the bolts. The spigot is there to aid centering and location while fitting. That's why it's important to have the mating faces clean and unpainted etc. and the correct torque.As you found OP, spigots are rarely the tight fit they'd need to be if they were primarily designed to take the load and until fairly recently some cars, notably French brands, still had closed centre wheels which didn't mount on spigots at all.How does this work if this isn't the case: https://goo.gl/images/XWWTCW Link to comment Share on other sites More sharing options...
Speedtrip Posted November 9, 2017 Share Posted November 9, 2017 Agree with the above ⬆️ Link to comment Share on other sites More sharing options...
ScottR400D Posted November 9, 2017 Share Posted November 9, 2017 By the way it's possible to buy spacers to fit between the rim and the smaller hub spigot. There are a number of suppliers and a wide range of sizes in both metal and plastic (which seems to imply they're not load bearing) but the plastic ones can suffer from heat if used on track, I understand. So no need to ditch your rims, OP. Link to comment Share on other sites More sharing options...
Bricol Posted November 9, 2017 Share Posted November 9, 2017 If the spigot and wheel hub were sized and toleranced for correct engineering practice load bearing fits, you'd never get the wheel off after a short while of use due to corrosion etc.Had a Lancia estate 30 years ago with no centre spigots - getting the spare wheel on at 1am in the middle of no where somewhere between Buxton and Chesterfield without a torch was great fun - Lancia used bolts, rather than studs, so plently of choice of how to position the wheel and not get a bolt in . . . Link to comment Share on other sites More sharing options...
monsterchub Posted November 9, 2017 Author Share Posted November 9, 2017 Thankyou all for your replies Link to comment Share on other sites More sharing options...
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