The Marston Sunbeam Club & Register Forum

General Category => Technical Discussion Forum => Topic started by: Malcolm Cutler on February 26, 2019, 09:50:00 AM

Title: M8 Tyre replacement
Post by: Malcolm Cutler on February 26, 2019, 09:50:00 AM
I am wanting to replace the rear 3.25 x 20 tyre on my M8.  As this tyre is now seemingly unavailable (unless someone can tell me otherwise) can anyone advise me whether to fit either a 3.00 or 3.50 replacement?
Title: Re: M8 Tyre replacement
Post by: phutton on February 27, 2019, 05:30:02 PM
I too have tried to get 3.25 x 20 - it was used extensively on sports bikes of the 1930s - but I had no luck. I think the 3.50 would look a bit heavy on your M8, so the 3.00 might be better. I am told that the £.00 x 20 that Tyre Finders sells is slightly oversize on the width anyway (about 3.125!) so it will probably work OK. A bit thin for my M95, though!

P.
Title: Re: M8 Tyre replacement
Post by: singleminded on February 27, 2019, 07:11:32 PM
https://www.ebay.co.uk/itm/300S20-ENSIGN-UNIVERSAL-MOTORCYCLE-TYRE-300-20-3-00-20-AJS-NORTON-MATCHLESS/372274527609?epid=1354149464&hash=item56ad4a7d79:g:7tcAAOSwol5Y0pse

It looks like it will have to be a 3.00 x 20  IF it will fit you rim properly..It might not expand tpo grip a WM2 correctly but i have seen a size chart for rims somewhere which explains suitability..I'll have a rummage in my memory to see if it's still hanging about..John
Title: Re: M8 Tyre replacement
Post by: wessex_man on February 27, 2019, 09:35:46 PM
Yes Vintage tyres stock two types Ensign Universal and Avon Speedmaster (for the front)
https://www.vintagetyres.com/shop/tyres/width-300/diameter-20
strange their eBay price is less than their website.
Title: Re: M8 Tyre replacement
Post by: phutton on February 28, 2019, 11:55:47 AM
The 3.00 x 20 will fit a WM2 rim.

P.
Title: Re: M8 Tyre replacement
Post by: Malcolm Cutler on February 28, 2019, 04:56:13 PM
Many thanks for all your advice and comments.  I have ordered the 3.00x20 Ensign tyre through e-bay but from Vintage Tyre Supplies (who I have previously had good service from.  I phoned them and asked about the price differential and they said it was due to the greater efficiency/automation using e-bay.  Maybe it does mean it speeds up the order processing but not really sure that this is the reason!
Title: Re: M8 Tyre replacement
Post by: Greybeard on February 28, 2019, 07:33:31 PM
The mysteries of ebay, eh? I got a pair of Avon tyres for my imitation (ie modern  :-\ ) Bonneville delivered 'free' yesterday - less than 20 hours after I ordered them from M&P via their ebay shop.
The price was less than my mate could get them for and he has a trade account with them. The same applied to the tyres I got from them for my 3 1/2 Morini a couple of months ago.

Steve