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20 inch knobbly tyres? #692623
04/21/17 6:38 pm
04/21/17 6:38 pm
Joined: Sep 2014
Posts: 589
Naarfuk, UK
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Tigernuts Online content OP
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Naarfuk, UK
Anyone know where (in the UK) I can get a 20" front tyre suitable for my B50T? Rears are easy as they are 18", but all I can find in 20" are Avon Speedmasters (no thanks) and some make I've never heard of (Ensign? summat like that anyway, I think) which look slightly better but nowhere near good enough.

I have been googling away on this for a couple of hours, and the nearest I've got is an off-road forum which refers to Pirelli making 20" front tyres but it was from about 10 years ago, and it gives no info on what the tyres were called or where they could be got from!

I guess this is a common quandary for B50T / B25T owners?


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Re: 20 inch knobbly tyres? [Re: Tigernuts] #692633
04/21/17 7:46 pm
04/21/17 7:46 pm
Joined: Aug 2015
Posts: 1,110
Bolton Lancs UK
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Andy Higham Offline
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Personally I would get a 21" rim fitted (maybe on a spare hub) to maximise the choice of tyres


1955 BSA B31 500cc "Stargazer"
1962 Greeves 200cc "Blue Meanie"
1962/67 Greeves 350
1967 Greeves 360 Challenger
1984 Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
Re: 20 inch knobbly tyres? [Re: Andy Higham] #692653
04/21/17 11:59 pm
04/21/17 11:59 pm
Joined: Sep 2014
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Naarfuk, UK
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Tigernuts Online content OP
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That's exactly what I would do if it weren't for the fact that the 20" wheel is absolutely perfect - it looks as if it was made yesterday, and I can't bring myself to break it down unless there really is no other option.

So, I'm still looking for, and hoping to find, a supplier of decent trials / trail type 20" front tyres if anyone out there can help


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Re: 20 inch knobbly tyres? [Re: Tigernuts] #692701
04/22/17 10:45 am
04/22/17 10:45 am
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Naarfuk, UK
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Tigernuts Online content OP
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Still looking for a supplier of 20" front tyres, trials / knobbly type....


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Re: 20 inch knobbly tyres? [Re: Tigernuts] #692744
04/22/17 8:49 pm
04/22/17 8:49 pm
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Les P Offline

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Short of a NOS Dunlop Trials tyre I think the choices are limited as you have found.

No doubt this is the tyre you found and the only one it seems close to a trial pattern.

http://www.feked.com/universal-budget-20-motorcycle-tyre-300-20-road.html

Mitas do this one but more universal.

http://www.geotyres.com.au/3-00-20-h02-mitas-classic-highway-motorcycle-tyre/

There are at least two members on eBay / US (Both 'Brits) that might be able to find a NOS Dunlop Trials as a last resort.
If haven't already maybe (or that was the off road mentioned) https://www.b50.org/phpBB2/index.php


More bikes and projects than you can shake a stick at but they should be done in two shakes of a lamb's tail.
Re: 20 inch knobbly tyres? [Re: Tigernuts] #692747
04/22/17 9:08 pm
04/22/17 9:08 pm
Joined: Aug 2015
Posts: 1,110
Bolton Lancs UK
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Andy Higham Offline
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Dunlop have not made 20" trials tyres for many years, NOS Dunlops will be fukced. Age, air and light degrade the rubber, the maximum recommended age of a tyre is 5 to 7 years


1955 BSA B31 500cc "Stargazer"
1962 Greeves 200cc "Blue Meanie"
1962/67 Greeves 350
1967 Greeves 360 Challenger
1984 Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
Re: 20 inch knobbly tyres? [Re: Tigernuts] #692772
04/23/17 3:39 am
04/23/17 3:39 am
Joined: Jun 2002
Posts: 925
Jaffrey, NH, USA
Peter Quick Offline

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For a few years around 2002 Yamaha and Honda tried 20" wheels on their MX bikes and then went back to 21" wheels. Something about 21" 90/100 profile tires made the 20" wheel unnecessary. Also not many tire manufacturers got on board with the 20" tire concept. Once and a while I come across a new 20" Pirelli front knobby from that era but they are hard to find. I always tell folks to quit complaining (and try to be nice about it) and bite the bullet and switch over to a 21" rim. One can only do so much on an ancient or worn out 45 year old tire. Sure can't ride aggressively on one, The only new 20" tire options are totally unsuitable for dirt riding. Some shallow block tread tire from Coker tire (not a trials tire!) and a ribbed road tire. If folks tell you there are suitable 20" off road tires available have them point you to where they are actually for sale. Good luck on that.

Peter


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Re: 20 inch knobbly tyres? [Re: Peter Quick] #692773
04/23/17 4:13 am
04/23/17 4:13 am
Joined: Aug 2014
Posts: 974
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Les P Offline

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http://www.eBay.com.au/itm/NOS-New-...739-90-100-20-20-inch-tyre-/182376227940

Havn't followed contemporary MX for some time so did not know about those '20's. (Do have three Husqvarna's though, two 1968 MF's and 86 400WR )
Seems they are plentiful down here. (Dunlop 20's)


More bikes and projects than you can shake a stick at but they should be done in two shakes of a lamb's tail.
Re: 20 inch knobbly tyres? [Re: Les P] #692825
04/23/17 8:37 pm
04/23/17 8:37 pm
Joined: Sep 2014
Posts: 589
Naarfuk, UK
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Tigernuts Online content OP
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Tigernuts  Online Content OP
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Naarfuk, UK
Originally Posted by Les P
Short of a NOS Dunlop Trials tyre I think the choices are limited as you have found.

No doubt this is the tyre you found and the only one it seems close to a trial pattern.

http://www.feked.com/universal-budget-20-motorcycle-tyre-300-20-road.html

Mitas do this one but more universal.

http://www.geotyres.com.au/3-00-20-h02-mitas-classic-highway-motorcycle-tyre/

There are at least two members on eBay / US (Both 'Brits) that might be able to find a NOS Dunlop Trials as a last resort.
If haven't already maybe (or that was the off road mentioned) https://www.b50.org/phpBB2/index.php


Thanks Les - the Feked one is at least part of the way there, trials tyre-wise (the Mitas one is about as close to what I;m hoping for as the Avon Speedmaster!). I hadn't found the Feked one before, so thanks for putting me onto it - it may come in handy.

Also, useful info from Peter Quick - thanks, at least I now have an idea of what other bikes uses 20" front rims, and when.

And thanks for the info on ancient tyres Andy - I did actually know this, and I wasn't looking for a 45 year old Dunlop Trials Universal, but something new of the right size and style!


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Re: 20 inch knobbly tyres? [Re: Tigernuts] #692840
04/23/17 11:55 pm
04/23/17 11:55 pm
Joined: Sep 2008
Posts: 771
Edgewater, Md
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Blown Income Offline

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Edgewater, Md
I have a set of Maxxis MX tires on my C15s. 20" in the front, I can not remember where I purchased them from though. A Google search would/should bring them up.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
Re: 20 inch knobbly tyres? [Re: Blown Income] #692842
04/24/17 12:30 am
04/24/17 12:30 am
Joined: Feb 2011
Posts: 3,438
Orygone
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Orygone
Originally Posted by Blown Income
I have a set of Maxxis MX tires on my C15s. 20" in the front, I can not remember where I purchased them from though. A Google search would/should bring them up.




How long ago did you buy them. I don't see a 20" listed.


Bill B...


Boomer
Re: 20 inch knobbly tyres? [Re: Tigernuts] #693065
04/26/17 3:12 pm
04/26/17 3:12 pm
Joined: Sep 2008
Posts: 771
Edgewater, Md
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Blown Income Offline

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Edgewater, Md
It was around 2 yrs ago. I just checked too and it seems that the 20" is no longer available. I guess the best thing to do would be upgrade to a 21" front wheel.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
Re: 20 inch knobbly tyres? [Re: Blown Income] #693119
04/26/17 8:21 pm
04/26/17 8:21 pm
Joined: Sep 2014
Posts: 589
Naarfuk, UK
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Tigernuts Online content OP
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Originally Posted by Blown Income
It was around 2 yrs ago. I just checked too and it seems that the 20" is no longer available. I guess the best thing to do would be upgrade to a 21" front wheel.


Very reluctantly, I'm coming to that conclusion too. Extremely annoying because the 20" original front wheel is as perfect as the day it was made.


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Re: 20 inch knobbly tyres? [Re: Tigernuts] #693172
04/27/17 6:40 am
04/27/17 6:40 am
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Posts: 974
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Les P Offline

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About 2 seconds after you post getting a 21 inch front wheel you will be told the small brake is dismal and should have got a TLS followed by should have got a 19 inch TLS wheel. help laughing

If you do go 18 / 21 the Pirelli MT43's are one option.

https://www.pirelli.com/tyres/en-ww/motorcycle/all-tyres/sheet/mt-43-pro-trial


More bikes and projects than you can shake a stick at but they should be done in two shakes of a lamb's tail.
Re: 20 inch knobbly tyres? [Re: Les P] #693264
04/27/17 10:28 pm
04/27/17 10:28 pm
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Naarfuk, UK
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Tigernuts Online content OP
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Actually, the tiny 6" sls conical hub brake is surprising good. In fact I'd venture to say it's better than the 8" TLS (which is usually unbelievably poor). So whatever happens tyre-wise, I'll be sticking with the 6" brake hub. I'll look into the Pirellis, thanks for the tip.


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