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Tyres
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BantamBaz
Reading Berkshire
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May 30, 2020 - 10:59 pm
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Evening all.

Looking at my D14 today I thought the rear tyre looked a bit skinny. It's on spec a 3.00 but I was wondering if a 3.50 would fit without any detriment ?

There looks to be enough room in the swing arm.

Barrie

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cocorico
Central France
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May 31, 2020 - 7:28 am
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BASIL
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May 31, 2020 - 9:40 am
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Have found a 3.50 will rub on the chain guard. Regards Basil

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BantamBaz
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May 31, 2020 - 11:11 am
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Thanks both.

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Lone Wolf
The Black Country
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June 3, 2020 - 7:00 pm
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Wotcha.

It appears some folks put  3.25 on the rear - in fact the bike I'm working on at the moment had a 3.25 and it didn't look out of place.

I just might try a 3.25 once I get the rebuilt wheels back.

^..^

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chippy
medway
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June 3, 2020 - 8:06 pm
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I fitted Dunlop K70's  to my D14 , 3,00 x 18 on the front and 3,25 on the rear , If I was going to fit K70's again they would be 2,75 x 18 front and 3,00 x 18 rear , the edges of the tread is very wide "too wide" almost touching the front fork dent in the mudguard and the rear, well that was a real pain, in the end I removed the chain guard mounting bracket ,made and fitted it to the outside of the c/guard and also removed part of the c/guard to clear the tyre, by doing this it gave enough room for wheel alignment. I did'nt take a chance with my 2nd D14  it has 2,75x18 and 3,00 x 18 respective.

Regards Chippy.

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Lone Wolf
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June 4, 2020 - 12:53 am
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chippy said
 I did'nt take a chance with my 2nd D14  it has 2,75x18 and 3,00 x 18 respective.

Regards Chippy.  

Wotcha.

Funnily enough, my MZ has a 2.75 on the front.

Hmm - maybe a 3.25 on the rear is not such a good idea after all - I'd best take a few measurements first.

^..^

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Stoo63
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June 4, 2020 - 7:41 am
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As Cocorico says in post 2, there's an avalanche of previous posts on this subject, most of them appear to be saying stick with the original otherwise you'll have rubbing issues. Guess that's why the brains at BSA made them that size....

 '55 D3 Battery; '58 Square Four (project); '59 D1 direct lighting plunger; '59 Tiger Cub; '60 5TA;  '76 FS1-E; '91 GTR 1000;  '97 Honda Sky SGX50.

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