Raleigh 26tpi issue

Over the weekend i picked up an old raleigh record bike with looks to converting it to fixed gear.
After looking into it is seems that i might have a few problems changing over the cranks as it has 26tpi threading in the bottom bracket.

Has anyone else converted an old raleigh before that can suggest any ways to get around this or if i decide to stick with the old cranks is there likely to be any major chain line issues?

Watch out for this. I gave up my Raleigh rebuild due to issues with the BB.
You can of course get it re threaded.

Not all raleighs have the funny threads, have you checked to make sure yours does does not?

no i havn't checked it yet as i dont have a spare bottom bracket to try in it. Is there
Would it be expensive to get it re threaded? and where can you get things like that done?

From sheldons website

iso b.b are 1.37" and 1.375 " diamiter raleighs are 1.375". So it would be poddible to recut the threads to 24 tpi BUT the shell width on an iso is 68 mm and 71 mm or 76 mm theis could cause bigger problems. First messure you b.b shell this will tell you if it is an iso or Raleigh b.b. What is the bike origianly? If it is a three speed don't worry they are on a 42 mm chain line, juct make sure you buy a hub with a 42 mm chainline (i.e not goldtech or others with non standard chainlines). If it is a 10 speed or similar you may be in luck with the inner ring being 42 mm and some chainring spacers may be able to help move your chainline about abit.

its a 5 speed and only has one chain ring on the front.
Would that mean that it is likely to be 42mm?

If that is the case then i will probably chose the easy option of keeping the origional cranks on it as i quite like the oldschool feel.

if it's a 5 speed you should be OK as the rear should be 120mm, then most track wheels will line-up. i'd leave the BB and cranks, unless they are FUBAR.

just bring the frame around tomorrow and i'll sort it out, I will try pick the other frame up tonight.

rideordie its a 5 speed and only has one chain ring on the front.
Would that mean that it is likely to be 42mm?

If that is the case then i will probably chose the easy option of keeping the origional cranks on it as i quite like the oldschool feel.

Yeah I would agree with dogsballs my grilfriends bike is an old 5 speed and seems to have a 42 mm chainline.

can't you get threadless BBs? usually used for frames whose threads have stripped..

the threadless BB's seem to come in 110mm and above, £15-20
sheldon suggests phil wood cups and a shimano 72 BB, expensive option.

Ceeway do a italian-english convertor sleeve for bottom brackets, you could possibly get your BB cut to the italian thread and then fit the sleeves? probably overkill for this but worth knowing:

http://www.framebuilding.com/Sundry-Components.htm

BillB Ceeway do a italian-english convertor sleeve for bottom brackets, you could possibly get your BB cut to the italian thread and then fit the sleeves? probably overkill for this but worth knowing:

http://www.framebuilding.com/Sundry-Components.htm

Italina b.b are 36 mm but raleighs equate to just less than 35 mm

Yeah, you would have to get the BB re-tapped to italian thread which is probably complete overkill for this project unless you know someone with suitable gear to do it, BUT its another option to be aware of (and a good one if you have stripped BB threads ;)).

BillB Yeah, you would have to get the BB re-tapped to italian thread which is probably complete overkill for this project unless you know someone with suitable gear to do it, BUT its another option to be aware of (and a good one if you have stripped BB threads ;)).

no I mean the internal dimiter is bigger on a italian b.b so you would have to turn out some metal from the b.b shell or replace the shell to do what you are sudgesting.

Yeah you would need to do some metal work, you could probably get away with using a reamer to remove the current thread (enlarging the BB hole) then re-tap to italian. its a lot of work but worth being aware of.

All good ideas but awaste of money really, hopefully the chain line is 42 as it is
Simple solution to the problem is the frame im collecting for him tonight,

i have a cup and cone bottom bracket which i suspect is raleigh thread (it binds after screwing in a few threads on an english bb shell)
maybe you'd like to have it and try to find a spindle that'll match?
i don't see any fall backs which it won't work this way... correct me if i'm wrong though, everyone.

by that i mean you fit those cups on and find another spindle that's the right length to give you a chainline. that spindle on it is currently a 120mm one.

thanks scrapper that frame looks awesome. I think that is the best option at this stage. also edmundane thanks for the offer is it a modern bottom bracket or similar to what would be in it now (a cottered crank)

it's modern one takes cotterless cranks, square ISO taper but in the end it all depends on that spindle you'll need to find anyway.