Windsurfer Posted January 19, 2022 Share Posted January 19, 2022 Hi all! I want to switch my 16in HPC wheels mounted on 205/45/16 to 13in Apollo wheels with avon zzs tyres (185front and 215 rear) It will have the negative effect of lowering ride height if the suspension is left as is. My question is : will I be able to re-ajust the ride height (blistein coilover, wide track suspension) without negatively affecting suspension geometry. I cannot afford to lower the ride height by much. Thanks and best regards Link to comment Share on other sites More sharing options...
7SW Posted January 19, 2022 Share Posted January 19, 2022 Hi,I did switch from 15'' to 13'' (S3, 1600K). I had to review the ride height on all corners.Following to this, I also did again a corner weight setup for being sure that everything was fine and then went to the garage for reviewing the geometry as some values were changed. Link to comment Share on other sites More sharing options...
K7 VCT Posted January 19, 2022 Share Posted January 19, 2022 Tiresize.com gives a good idea of the change to the tyre dimensions Link to comment Share on other sites More sharing options...
Wrightpayne Posted January 19, 2022 Share Posted January 19, 2022 Also Willtheyfit is a good site for comparing tyre sizes. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted January 19, 2022 Area Representative Share Posted January 19, 2022 will I be able to re-ajust the ride height (blistein coilover, wide track suspension) without negatively affecting suspension geometry.No, I don't think so :-(The front is the greatest concern.... The 16" tyres have a nominal diameter of 590mm, and the 185/55-13 fronts have a nominal diameter of 533mm, which would drop your ride height by around 28mm.If the spring platforms are simply adjusted to correct the ride height, the camber and toe are likely to be quite some way away from optimum. Typically, increasing ride height is likely to reduce negative camber. Assuming the camber setting did stay acceptable, the toe measurment is likely to have changed due to the bump steer characteristics.At the back you'll loose around 12mm, but spring platform height should easily correct that. Link to comment Share on other sites More sharing options...
DougBaker Posted January 19, 2022 Share Posted January 19, 2022 https://www.willtheyfit.com/ Link to comment Share on other sites More sharing options...
Windsurfer Posted January 19, 2022 Author Share Posted January 19, 2022 Hi Richard, thanks for your answer. My first thought is that I could correct this with the top ball joint on the upper arm ( professionnaly). The chassis is a s3 imperial. Does this means that all 13in wheels users have a lower ride height or there`s been some change in suspension design?best regards Link to comment Share on other sites More sharing options...
Rex Posted January 19, 2022 Share Posted January 19, 2022 When I switched from 205/45/16 to 185/70/13 I did not notice any difference in the ride height--much lighter feel though. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted January 19, 2022 Area Representative Share Posted January 19, 2022 When I switched from 205/45/16 to 185/70/13 I did not notice any difference in the ride heightRex,205/45-16 and 185/70-13 are pretty much the same in overall diameter. Both sizes of 13" ZZS are significantly smaller in diameter. My first thought is that I could correct this with the top ball joint on the upper arm ( professionnaly). The chassis is a s3 imperial. Don't forget that any change of camber will also affect the toe, so both need to be adjusted together. Does this means that all 13in wheels users have a lower ride height or there`s been some change in suspension design?No, not really. There is quite a bit of scope for ride height adjustment to accomodate different wheel sizes. Link to comment Share on other sites More sharing options...
Windsurfer Posted January 20, 2022 Author Share Posted January 20, 2022 Thanks for your replies@Richard So it means that if I have the suspension set professionally, I should be able to get back to a ride height close to what I had. Shock and coil assembly are pretty much at their shorter lenght. Best regards Link to comment Share on other sites More sharing options...
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