Advice sought - Sq 4 MK II tyres and wheel bearings

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pauldridge
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Advice sought - Sq 4 MK II tyres and wheel bearings

Postby pauldridge » Mon Dec 05, 2016 5:19 pm

Still putting my '53 Mk II back together after its angry munching of a connecting rod and piston. Now that the engine parts are at the machinist, I can devote myself to other external issues.
1) my tire(s) tread look new, but they are certainly 10-15 years old and I am starting to see a bit of checking. Time for new. Recommended brands and sizes would be appreciated
2) I have ordered new sealed front wheel bearings.
a) can I assume there is no need for seals with the sealed bearings?
b) Need advice on replacing these.. I ordered a pegged wrench from Dragans which looks like it might be of help in removing those outer keepers?

Thanks in advance
Phil Auldridge Austin, Texas - USA
Visit the North America Ariel forum: http://arielnorthamerica.org/phpBB3/
53 SQ 4 MK II, '72 Norton Commando, '78 BMW R100/7, '79 Honda CBX, 2014 Indian Chief Vintage

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paul.jameson
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Re: Advice sought - Sq 4 MK II tyres and wheel bearings

Postby paul.jameson » Tue Dec 06, 2016 11:44 am

1) Tyres. AVON AM26 Roadrider. 3.25 x 19 front, 4.00 x 18 rear.
2) No need for extra seals with sealed bearings.
3) You need an appropriate tool to remove the retaining rings which screw in to the hub with a normal right hand thread. The brake side bearing for the front wheel has a "top hat" spacer inside it which you will need to press out of the old bearing and into the new one.
Paul Jameson
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.

Brian.Fosh
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Re: Advice sought - Sq 4 MK II tyres and wheel bearings

Postby Brian.Fosh » Fri Dec 09, 2016 12:17 am

Hi Phil.
When I chose my tyres, I did a bit of hunting for online data and found 1.5 inches difference between some tyre O/D's. That's 5 inches difference in travel per rev of the rear wheel. It's also equivalent to around half the change in gearing from fitting one of Drags 40T clutch sprockets instead of 44T. The reasons for choosing Tyres is mighty varied and personal of course... but I thought it was interesting to dscover such a wide range of diameters.
Regards, Brian.

Tyres.JPG

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Re: Advice sought - Sq 4 MK II tyres and wheel bearings

Postby Simon.Gardiner » Fri Dec 09, 2016 2:00 pm

If you've got a 19" front and an 18" rear you can use Bridgestone BT45 for both (won't have anything else on my BM so they must be good for a Square!)

SG
'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)


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