adhawkins Posted February 5, 2006 Share Posted February 5, 2006 I need to buy some new wheels for my Westfield. What offset / stud pattern do I need? Quote Link to comment Share on other sites More sharing options...
chappers Posted February 21, 2006 Share Posted February 21, 2006 For 15 inch wheels for a current SEiW, Westfield say they fit 7Jx15, 4x108pcd (Ford 4 stud pattern), with an offset of et+35 as standard. If you want though to have the wheels slightly in towards the car body then a greater offset e.g. et+38 (3mm narrower track each side w.r.t. et35 wheels) would do, or if your wheel arches/cycle wings allow, then some people run a smaller offset e.g. et+23, to get an extra 12mm wide track each side. Spacers can also be used to adjust the + offset (i.e. how far the wheel mounting flange is spaced outwards w.r.t. the centre line of the wheel) if the wheels you want do not come in the desired offset. For example if you need an et +35, then you can buy an et+40 wheel and use a 5mm spacer, bringing the offset back to +35 (i.e. 40-5). Quote Link to comment Share on other sites More sharing options...
Mark Culver Posted September 12, 2017 Share Posted September 12, 2017 Would these fit my Westfield seight ? Quote Link to comment Share on other sites More sharing options...
Andy (Sycho) Posted September 12, 2017 Share Posted September 12, 2017 No I would think you need ford fittment 4x108 Quote Link to comment Share on other sites More sharing options...
Mark Culver Posted September 12, 2017 Share Posted September 12, 2017 Thanks @sycho for your help , Quote Link to comment Share on other sites More sharing options...
DAN_B Posted October 10, 2017 Share Posted October 10, 2017 Hi, Interesting post, Sycho you clearly know your stuff! But how do I go about measuring my current PCD? I've got an early narrow body, with what I believe, early ford stud patterns but would like to check before I buy some new wheels. Thanks in advance! Quote Link to comment Share on other sites More sharing options...
CraigHew Posted October 10, 2017 Share Posted October 10, 2017 with a ruler; Edit: I was taught that the PCD was between stud centres, ie, represented by the (diameter of) the dotted circle above, although its the same result as the above method. Quote Link to comment Share on other sites More sharing options...
stephenh Posted October 11, 2017 Share Posted October 11, 2017 Be careful about the offset, they aren't all 35mm. on new or recent cars, so far as I am aware. I believe that is correct for the Mazda SDVs, but for the Ford based cars I think it is more likely to be 23mm. offset. But for some of the earlier cars (maybe Sierra SDVs?) it was I think about 35mm.. For early (ie narrows) I have no idea! Really, you need to measure, or borrow a wheel to check if thinking of changing to a different width, or different offset. It also occurs to me to point out that a lot of alloy wheels have the offset cast or stamped into the back of the wheel, so if you plan to replace a wheel with the same rim width and you are happy with the existing offset, then just look at the back of the wheels, and see if any of them have the offset marked on them. Usually if you want to change the diameter of the wheel, but not the rim width, then you will need the same offset, whereas if you are going to wider rims you will normally need less offset. 1 Quote Link to comment Share on other sites More sharing options...
Dave Eastwood (Gadgetman) - Club Chairman Posted October 11, 2017 Share Posted October 11, 2017 Stephen has hit the nail on the head here. The reason wheel size, in particular offset seem so confusing when you go back across multiple posts, is that Westfield has used multiple sizes over the years. Offset in particular has changed a lot. Unfortunately it is not possible to say fro a certain specific date or chassis number, the offset for a 13" x &" wheel became x or y. As a result the ONLY safe approach is to measure the current wheels and work from them. Duplicating the offset if its just a change in style and the fit is OK, or tweaking the offset if necessary. One final thing, bear in mind that just because a wheel may have a certain offset marked on it, doesn't mean it is 100% definitely that offset! A number of different manufacturers have been know to re-machine the offsets on stock wheels to match orders... So, like everything kit car related, always measure to be safe, don't just assume. Quote Link to comment Share on other sites More sharing options...
DAN_B Posted October 11, 2017 Share Posted October 11, 2017 Thank you very much guys, really interesting read and very useful! I am just after a change in style, the current set up is perfect really, I may just paint the current wheels to prevent any issues, not sure. My preference is the team dynamics black multi spokes, but that will be an increase in size then and I worry based on the above I may screw up the overall drive. Difficult one. But thanks again! Quote Link to comment Share on other sites More sharing options...
Rusty Nuts Posted October 13, 2017 Share Posted October 13, 2017 Once you have your current wheels dimensions you can use the below tool to see how the new wheels your thinking of will fit your car. Useful tool for calculating offset etc. 1 Quote Link to comment Share on other sites More sharing options...
Mark Tearney Posted March 16, 2021 Share Posted March 16, 2021 Resurrecting an old thread, im after a 2nd set of wheels. My current set of TD Prorace are 7J 4×108 et23 and I'm struggling to find a similar set. Ideally I like to keep the front the same but have something with a deeper dish on the rear and go a little wider perhaps (currently 195 50 15) but not essential. Current set with track tyres for track days and the other for touring. Any suggestions? TIA Quote Link to comment Share on other sites More sharing options...
stephenh Posted March 16, 2021 Share Posted March 16, 2021 Is the Prorace 1.2 no longer available? What I would point out is that a 205 section tyre will fit happily on the 7" rim and a 215 is ok but not ideal. 1 Quote Link to comment Share on other sites More sharing options...
Mark Tearney Posted March 16, 2021 Share Posted March 16, 2021 1 hour ago, stephenh said: Is the Prorace 1.2 no longer available? What I would point out is that a 205 section tyre will fit happily on the 7" rim and a 215 is ok but not ideal. Can't find any in et23 but I like the look of the compomotive cxr. Quote Link to comment Share on other sites More sharing options...
jonjh1964 Posted March 16, 2021 Share Posted March 16, 2021 2 minutes ago, Mark Tearney said: Can't find any in et23 but I like the look of the compomotive cxr. I fitted 13" x 7" ET20s to mine having had Team Dynamics 15" x 7 ET23 on it before - need to adjust the top shims on the cycle wing mounts by 1 x thick washer. with 205/60R13 R888Rs Quote Link to comment Share on other sites More sharing options...
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