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 Post subject: Advice on wheel size
PostPosted: Fri Aug 31, 2012 1:06 pm 
Old School Hero

Joined: Thu Jul 05, 2012 6:35 pm
Posts: 209
Location: Hull
My Sun frame arrived today so I now have measurements and was hoping I could get some help on whether to fit 700c or 27" wheels,the measurements are
Rear dropout to brake bridge =360mm
Between rear dropout=127mm
Front fork dropout to top of fork=350mm
Between front dropouts =95mm
As its my first proper build just wanted some advice on wheel size,if Ive got it right I seem to think I could use either but please tell me if Im wrong,thanks


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 Post subject:
PostPosted: Fri Aug 31, 2012 3:39 pm 
Retro Guru

Joined: Tue Jun 03, 2008 4:31 pm
Posts: 740
I am no expert but I would have thought that any Sun would be old enough to need 27" wheels and that the dropouts should be 120mm. (just maybe new enough for 126 but doubt that)
Of course it may be something that isn't an old Sun. Did someone like Raleigh buy the company and carry on putting them out?
But assuming it's a proper old one the above should be correct.
Correct me of course if my general rather than specialised knowledge is wrong.


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PostPosted: Fri Aug 31, 2012 4:20 pm 
Old School Hero

Joined: Thu Jul 05, 2012 6:35 pm
Posts: 209
Location: Hull
Its a Worksop built one so after Raleigh bought them,the rear is def 126/7


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PostPosted: Fri Aug 31, 2012 5:04 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8226
Location: Cumbria
As mentioned the original wheelsize would have been 27 X 1 1/4 with a rear OLD of 126mm for a 5 speed screw on freewheel.

Options are to use the original size wheels and keep your brakes or go for 700c clinchers and change the brakes because the 700c are about 11mm smaller in diameter.

The frame will have been built with large clearences in the first place so going to 700c just makes them look silly in my eyes :)

Shaun


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 Post subject:
PostPosted: Fri Aug 31, 2012 6:14 pm 
Old School Hero

Joined: Thu Jul 05, 2012 6:35 pm
Posts: 209
Location: Hull
27 inch it is then,as for the hub size Ive read somewhere that a 130 hub could fit,is this correct thanks


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PostPosted: Fri Aug 31, 2012 6:21 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8226
Location: Cumbria
You could simply "spring the frame" by 2mm each side when you put a 130mm wheel in, adjust the frame yourself (Sheldon Brown), get a local bike shop to cold set it or mess about with the washers..........

I'd try and spring the frame first, the wonder of a steel frame :)

Shaun


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PostPosted: Fri Aug 31, 2012 6:34 pm 
Old School Hero

Joined: Thu Jul 05, 2012 6:35 pm
Posts: 209
Location: Hull
Ill give that a go then,if I manage not to cock it up Ill be building one for myself :D


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PostPosted: Fri Aug 31, 2012 7:49 pm 
Road Moderator
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Joined: Thu Jun 18, 2009 1:07 pm
Posts: 4715
Location: Sheppey, Kent
Ah I see! I was going to comment that you will probably not find a 27" wheel with 130mm hub. I thought you was going ss on this?

I think that 700c with huge baloon tyres (something like these http://www.cyclestore.co.uk/productDeta ... ctID=55364 ) would work well. The fat tyres would fill the void. But then I guess you have got the brake reach problem so 27" would probably be best in which case I'd use Michelin World Tour tyres.

I will check some measurements on one of bikes against yours though just to be sure.....


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PostPosted: Fri Aug 31, 2012 9:34 pm 
Old School Hero

Joined: Thu Jul 05, 2012 6:35 pm
Posts: 209
Location: Hull
Thanks Tel any help would be great as its all new at the mo,I found these,do you all think theyll do the job/
http://www.ebay.co.uk/itm/280953095830? ... 1423.l2649
http://www.ebay.co.uk/itm/320886934221? ... 1423.l2649
on the second one I presume theyll be a better buy cause of the rims but Ill have to ring em about the hub size,I do want to do a single speed so would these work with a freewheel and spacer kit?


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 Post subject: Re: Advice on wheel size
PostPosted: Fri Aug 31, 2012 10:39 pm 
Road Moderator
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Joined: Thu Jun 18, 2009 1:07 pm
Posts: 4715
Location: Sheppey, Kent
OrangeJase wrote:
My Sun frame arrived today so I now have measurements and was hoping I could get some help on whether to fit 700c or 27" wheels,the measurements are
Rear dropout to brake bridge =360mm
Between rear dropout=127mm
Front fork dropout to top of fork=350mm
Between front dropouts =95mm
As its my first proper build just wanted some advice on wheel size,if Ive got it right I seem to think I could use either but please tell me if Im wrong,thanks


Measurements of an SLX close clearance frame.

Drop out to bridge - 360mm
Fork to crown - 360mm

Compared to yours something just doesn't add up....

I measured from where the axle of my wheel sits to the centre of the brake bolt. Mine uses 39mm - 49mm brakes.

If you did the same then I'm thinking that it can't be 27" rims that you need, I would not be able to get 27" wheels in my frame and I doubt that yours is built with the same clearances as mine! Also your fork end to brake is 10mm less at 350mm if thats the case then you won't even get a 700c in.

I'm wondering if your bike was built with 26" wheels. Especially being so small. Would be good if someone else could add their frame measurements, especially if they've got a 27" wheeled bike (or a 26").


Last edited by Tel on Fri Aug 31, 2012 11:00 pm, edited 1 time in total.

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