dinanminicooper Posted August 10, 2012 Share Posted August 10, 2012 Hello - new with my Megabusa, and will be running Hoosier R6s on track, but just picked up some 21.5x8x13 Hoosier bias ply tires super cheap. They are SCCA formula FE tread tires. Was wondering if anyone has any experience with these (tire pressure etc) and if anyone thinks they could go on 7" wide rims. Hoosier recommends 8" rims. I don't think I will have body/fender clearance issues. Think these could be more of a autocross tire rather than a road race tire for me. Also, does anyone know what the bolt pattern/offset is for Team Dynamics 1.2 race wheels for the Megabusa? Thanks again! DMC Link to comment Share on other sites More sharing options...
JohnCh Posted August 11, 2012 Share Posted August 11, 2012 Westfield and Caterham use the same bolt pattern: 4x108. They also share the same offset for their 6" wheels at ET24, but Westfield uses ET35 for their 15x7 wheels. That places the outside of the wheel in essentially the same place, but the inside extends inward about 24mm. On my car, that would foul the front wing stays. Have you looked for an ET stamp on your current wheels? Most manufacturers have this, although sometimes it's hidden on surface that mates to the hub. -John Link to comment Share on other sites More sharing options...
JohnCh Posted August 11, 2012 Share Posted August 11, 2012 Hmm... Westfield has made changes over the years, so I just did a search on WSCC and it sounds like the ET35 is no longer the current recommendation. According to posts 2 & 3 here, the factory is recommending ET24 for the Team Dynamics: http://forum.wscc.co.uk/forum/index.php?/topic/95634-seiw-standard-wheel-offset-23mm/ -John Link to comment Share on other sites More sharing options...
lancylad Posted August 11, 2012 Share Posted August 11, 2012 I have caterham prisoner wheels on my 1995 Westfield, 6.5 x 15 ET13. This wheel thing confuses me! Link to comment Share on other sites More sharing options...
ayseven Posted August 11, 2012 Share Posted August 11, 2012 Higher offset = wheel more inward Less offset = wheel more outward eg. 0 offset wheel gives a wider track than a + 45 offset wheel You can measure any rim by checking wheel width, then measuring the distance to the centre of the rim (the part that sits against the hub) from the INSIDE edge, using two rulers. The difference between the half way point of the total width, and this distance from the inside edge, is your offset. There is no way to tell what anybody needs, because all the cars are so different, and have their wing stays mounted differently (unless you have bog standard Westfields or Caterhams). Link to comment Share on other sites More sharing options...
lancylad Posted August 12, 2012 Share Posted August 12, 2012 Gotcha.. Cheers Link to comment Share on other sites More sharing options...
jlumba81 Posted August 15, 2012 Share Posted August 15, 2012 Is there any factory wheel that will fit a 7? I'd like to be able to use those search functions that most tire/wheel sites have. Link to comment Share on other sites More sharing options...
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