GrahamV Posted January 18, 2009 Share Posted January 18, 2009 Had the wheels off today to give the bits underneath a good clean..... When putting the wheels back on I noticed that on all of the wheels the studs only go halfway into wheel nuts - i.e. it looks as if the studs could / should be half an inch longer to fill the length of the wheel nut. Car is a 2000 Superlight R with the standard 5 spoke wheels. Any ideas? Are there different stud lengths? G Link to comment Share on other sites More sharing options...
Support Team Shaun_E Posted January 18, 2009 Support Team Share Posted January 18, 2009 It's probably not a major issue - Caterhams have been running like that for years. When I switched to the new design 8 spoke wheels I found that the nuts only went on a few turns. Caterham now fit longer studs so I bought new hub assemblies - you can just replace the studs if you want. Yellow SL #32 - member of Drowned Rat Racing Link to comment Share on other sites More sharing options...
Englishmaninwales Posted January 18, 2009 Share Posted January 18, 2009 As Shaun says, just replace them with longer studs. CC supply them. It maybe an issue if you compete in the car- a scrutineer took issue with me about it ( I was unaware of the problem until he pointed it out to me). Malcolm Link to comment Share on other sites More sharing options...
Tonycaterham Posted January 18, 2009 Share Posted January 18, 2009 Hi Graham, I had the same concerns on my 7 when running slicks on a track day a nut clinging on to a few threads did not fill me with confidence. I've now fitted the 40mmm studs from Caterham (Part no 77369) nd this now means the stud is almost flush with the end of the nut. Fronts are easy, back ones are pain as you need to remove the dreaded hub nut. Tony Tony L7 EVL Link to comment Share on other sites More sharing options...
ECR Posted January 18, 2009 Share Posted January 18, 2009 Wheel stud Length Thread engagement length. In general, according to Machine Design magazine, the minimum recommended length of engagement is 0.75 to 1 times the bolt major diameter for threading into steel and other materials of comparable hardness; and 1 to 1.5 times the bolt major diameter for threading into brass, cast iron, and aluminium. These lengths of engagement specified are for full threads engaged, not overall bolt length. Regarding partial threads in the chamfers on the ends of internal or external threads, FED-STD-H28/2B, 1991, Sect. 7.7.2, p. 61, specifies that approximately half the countersink or chamfer depth may be included in the length of engagement calculation. For a 12mm x 1.5 pitch nut that equates to 9mm of engagement absolute minimum(6 complete turns of the nut) or 8 full turns if 12mm engagement is used Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted January 18, 2009 Share Posted January 18, 2009 Wasn't happy that my wheel nuts only engaged about 4 threads with the original 32mm long studs. Changed them to 40mm long studs - now much happier. Link to comment Share on other sites More sharing options...
GrahamV Posted January 18, 2009 Author Share Posted January 18, 2009 Thanks for all the feedback ..... very interesting. I'm not happy that I only have about 6 threads holding on each wheel nut. I would feel happier / safer with the 40 mm studs. I will upgrade. G Link to comment Share on other sites More sharing options...
k.russell Posted January 19, 2009 Share Posted January 19, 2009 also intend doing this upgrade Graham, i have purchased some new through nuts and need some longer studs, although the 40mm ones from cc would probably do the job i would prefer a longer stud, ideally 46mm. has anyone sourced the correct studs from anywhere else other than cc at a reasonable price. the ones in demon tweeks are around £4 each Kevin R black(but sometimes orange)-ali HPC here Link to comment Share on other sites More sharing options...
GrahamV Posted January 19, 2009 Author Share Posted January 19, 2009 Hi Kevin I've gone for the 40mm ones from Caterham - £1.06 each with free postage. £4 each stud seems a bit steep. GPR do a range of High Tensile Competitioon wheel studs from 43mm long right up to 60mm long - prices from £1.60 to £1.95 (2008 catalogue) The other place I would try is Merlin Motorsport .... Good luck G Link to comment Share on other sites More sharing options...
Manxseven Posted January 21, 2009 Share Posted January 21, 2009 Are these any good, here Simon ----- Caterham BEC here Link to comment Share on other sites More sharing options...
Tonycaterham Posted January 21, 2009 Share Posted January 21, 2009 IF you have MB wheels then if the studs are too long you will not be able to screw the closed wheel nuts on far enough to properly secure the wheel. This necessitates having to cut them all down, I speak from experience Tony L7 EVL Link to comment Share on other sites More sharing options...
Irrelevant Posted January 21, 2009 Share Posted January 21, 2009 This necessitates having to cut them all down, I speak from experience I need long studs for spacers if I fit certain wheels so I just machined the ends off the MB nuts so the long studs can go through if necessary. Link to comment Share on other sites More sharing options...
Tonycaterham Posted January 22, 2009 Share Posted January 22, 2009 Adam, I like my MB nuts so it would have been a shame to open up the ends, but it would have been a viable alternative. Tony L7 EVL Link to comment Share on other sites More sharing options...
k.russell Posted January 22, 2009 Share Posted January 22, 2009 Thanks Simon, i had looked at those but wasn't sure if they were OK as the thread length isn't shown and they appear to have a shoulder on the drawings, was hoping someone could confirm they have fitted these. Kevin R black(but sometimes orange)-ali HPC here Link to comment Share on other sites More sharing options...
GrahamV Posted January 22, 2009 Author Share Posted January 22, 2009 I ordered a full set of the longer 40mm studs from Caterham last week - had an e-mail today saying they are out of stock but expect to get some in about a months time ☹️ Graham V Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted January 22, 2009 Share Posted January 22, 2009 Must be able to buy them from another outlet ? M12 x 1.5 threads Link to comment Share on other sites More sharing options...
captain chaos Posted January 22, 2009 Share Posted January 22, 2009 Demon Tweeks (call Dave) or Merlin motorsport....both will have them for next day delivery... Link to comment Share on other sites More sharing options...
Jason Plato Posted January 23, 2009 Share Posted January 23, 2009 be careful ❗ some of the extended / other wheel studs have a shoulder at the base of the thread that prevents the wheel nut from screwing down on the wheel insert properly. The caterham supplied 40mm ones dont have this shoulder and the thread extends the full length of the stud. I bought a set from rally design and found this problem. Then i bought a set from Caterham 😶🌫️ hope this prevenmts you from wasting money here is C7 TOP Taffia joint AO with Al Link to comment Share on other sites More sharing options...
k.russell Posted January 23, 2009 Share Posted January 23, 2009 these look ok in the picture ,here dont seem to have a raised shoulder, although the thread doesnt go right to the splines i dont think that would matter. thoughts please Kevin R black(but sometimes orange)-ali HPC here Edited by - k.russell on 24 Jan 2009 08:50:10 Link to comment Share on other sites More sharing options...
guilleracing Posted January 23, 2009 Share Posted January 23, 2009 Mechanically speaking, a threaded fastener is only required to have the width of the stud/bolt/screw etc secured into the nut. When you think about it it does make sense. Edited by - guilleracing on 23 Jan 2009 21:37:57 Link to comment Share on other sites More sharing options...
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