Wheel and tyre questions

[gudgyz]

Hi Guys,
Hopefully a simple one for you.
After failing a WOF recently due to my stock wheels being different to the cert plate (which has since been sorted, Thanks) I have a query regarding moving up a size slightly in the rims from 5" to 6" or 7" wide such as these:
www.classicchevy.com/chevy-oe-style-steel-wheel-for-use-with-disc-brake-conversion-1955-1957.html

Will this require another cert and plate or will this get through as an aftermarket wheel fitment where the wheels are of a known and reputable brand and would be catalogued as an appropriate fitment for the vehicle type by the wheel manufacturer?

The reason for the change is I am wanting to go up to a 215x75x15 wide white on the rear and the local WOF guy says this wont fit on a 5" rim but Diamond back who supply the tyres list the rim width as 5"-7".



Your advice would be appreciated.
Cheers.
Kevin

[Dan]

Hi Kevin

The LVVTA infosheet provides a summary of wheel/tyre compatibility from leading tyre manufacturers and it is available here:
Wheel/Tyre compatibility infosheet

This doesn't list all tyre sizes, the closest is a 215x70x15 and that fits on a rim width of 5.5" to 7". However, we recognise that some manufacturers will have slightly different tolerances to those that are listed. The first page of the infosheet recognises this:

Individual Tyre Manufacturer’s Variations:
Whilst we have made every reasonable effort to ensure that the information contained in this
information sheet is correct, specifications regarding tyre size and fitment vary between tyre
manufacturers. Where our sources have provided us differing specifications in compiling this infosheet,
we’ve broadened the range to encompass the minimum to the maximum rim width,
allowing for the broadest possible fitment range. Additionally, where an LVV Certifier is presented
with a wheel & tyre combination which is outside the scope of the tables in this info-sheet, LVVTA
requires that the guidelines of the tyre manufacturer in question are followed, and verification
from the tyre manufacturer is provided by the LVV Certifier when forwarding the LVV plate
application.

When it comes time to certify, present the information from the tyre manufacturer to prove it is ok. It is useful if the information is verifiable - yours is available on the DB Tires website so that's all good - a note from the local tyre fitter won't be sufficient.

Now that is sorted your other questions are not so relevant, but I'll answer them anyway:

The aftermarket wheel information you've quoted is from the threshold document and is relevant to know if certification is required when adding wheels to an unmodified vehicle.

Your certification plate lists the wheel size and so if you change wheels this information will no longer be correct - that's a WoF fail so this does require a re-inspection and a new certification plate.

Dan