Ask Honest John

Most recently answered runflat tyres questions
The low profile tyres on our BMW 530d xDrive are easily damaged by potholes, as are the alloy rims. Is there a safe alternative?
My 2019 BMW Z4 will soon need new tyres. Should I renew with runflats or not? The latest G29 M4s are not fitted with runflats by BMW and lots of drivers say comfort levels are much improved with regular...
I read with interest your reply to the reader who enquired about best tyres for potholes. My BMW 320i has 225/45R18 which are runflats. I have always assumed that runflats would be more resilient to pothole...
Does my insurance company need to be told if I change the tyres on my BMW 6 Series from runflats to standard ones? Would this affect the cost?
I have recently purchased an Audi A7 on 20-inch wheels. If I replace the wheels for 18-inch wheels would I achieve a greater level of comfort? Would you recommend run flat tires on 18-inch wheels?
My 2017 VW Golf GTE has 225/40-18 tyres which will soon need replacing. The Michelin Cross Climates are attractive and often recommended by you. However, the runflat version (Zero Pressure) only seems...
I have Mercedes E350 with run flat tyres, if I replace these with ordinary tyres would this affect the insurance or my Mercedes service and breakdown cover?
My car has no spare, nor room for one due the batteries, and I am reluctant to solely rely on the Tyre Slime to get me home. I have been looking to fit Pirelli All-Season XL Seal Inside tyres, however...
My wife's 2014 Mercedes C-Class Estate has non-runflats from factory (225/17/50). I would like to fit Michelin Crossclimate + ZP runflats, starting with 2 rear wheels then two fronts. Can I retro-fit...
I have a 2022 BMW 223i M Sport Active Tourer which came with non-run flat tyres fitted on BMW alloys. We suffered a puncture in a remote part of Scotland on holiday last week & the tyre repair kit was...
 

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