HowTo? Fixed / Singlespeed conversion from an old bike

i'd say it's still something decent the lugs don't look too 'thick' and same for the seatpost wall thickness - also for some reason i've only ever seen the BB cut out on decent frames - also no mudguard loops at dropout - which for this year suggest not an ordinary cheapo , and seat stays look thininsh near rear- none of these things in and off themselves make a good frame but seem to be good cues to go by that suggest it's not crap - how old is it?
60s/70s? if it was too young with pressed dropouts i'd have my doubts on the quality
i've heard some people talk about flicking the frame to listen for the ping - i think it's a load of bollocks myself - if anything the better the less ping i've found but i don't think you can tell anything from that - any opinions anyone?

oh yes you can actually see if the threads both catch clokwise (italian) or right side anticlockwise - look at the slope of the thread - as for the chainline - it's nice to get it straight but not essential - you can differ chainwheel left / right of the spider - i've always found the ubiquitus formula hub to go fine on the inside ring of a stripped down double road set up.

Its definitely italian, and its definitely late 60s to mid 70s, well thats what HillaryStone has said and hes apparently a bike historian so I reckon he knows what hes on about. Its almost certainly columbus sl tubing, I can tell that just by comparing it to my aelle tubed frame, its noticeably lighter. By all accounts its something decent.
Im still not sure what to do with it though, guess Ill stick with it, but I feel now as if its slightly going to waste by me riding it around as a bit of a beater fixie conversion given that its a bit more vintage and nice than an 80s moser.

pardon me, i'm just trying to keep up.

so if it was a 80's moser you wouldn't convert it and seeing as its not a 80's moser you definitely don't want to convert it.....did i get that right?

sorry if i missed something.

Umm, not really, if it was an 80s moser I wouldnt be bothered about converting it, I originally wasnt sure because I thought it might be too much of a hassle.
Now Ive found out its a 70s italian frame of some description, Id like to try and find out a bit more about it before I turn it into fixie, cos Id feel it would be a shame to waste something like that by turening it into a beater fixie when someone else might want to restore it and ride it as it was intended to be ridden.
I realise Im being a complete idiot and not making much sense, sorry

I'm looking for some feedback from folk who know better than me!
I have a low profile bike that I would like to convert to ss/fixed.
The plan was to use it for tt-ing but for various reasons, thats not happening.

I did try to sell it but now I've decided I will get the use of it by making the position a bit more upright. Riser bars, short stem etc.

Its got a 650c front wheel. I wondered if I can swap the forks to let me use x2 700c wheels. Is it possible to do this, and is it advised or will this mess with the geometry?

Cheers!

The bike in question;

Put it in the relevant gear and don't touch the shifters.

Please, step away from the bike.

...actually, do what you want, but it looks rather nice as it is!

Is that a full Chorus groupset?

Is it possible to do this, and is it advised or will this mess with the geometry?

Yes, no, yes.

What size is it equivalent to?

i thought this was going to be about jeezus

Put it in the relevant gear and don't touch the shifters.

Please, step away from the bike.

...actually, do what you want, but it looks rather nice as it is!

Is that a full Chorus groupset?

I know what your saying about touching it but I planned to keep the bits to revert back to its current state.

Yeah its a Chorus groupset. The bike has done very little miles its just not working for me as a TT bike.

So, the 700c wheels is it possible? Has anyone on here done similar?

i thought this was going to be about jeezus

Im beyond redemption:)

What size is it equivalent to?

About a 55cm.

It'll raise the BB height whilst slackening off the angles of the headtube, giving it lazier handling.

Going to a 700C might bring with it toe-overlap, depends on crank length etc.

If it were bigger I'd have bought it from you so that it could stay as it is.

Do you think a straight fork would
be better or worse than a raked fork in terms of toe over-lap, slackness in handling etc?

Bit of a how long is a piece of string argument without being familier with the bike.

I'd still counsel against doing it- what is the rationale behind the swap?

Just raise the front end up with a longer stem (vertically) and risers (4 inch risers if needed)? Why do you long to move to 2 x 700s?

Or just sell it so it can fulfill a purpose and buy something nicer/suited for the same money?

The thinking behind the 700c wheels was to gain a bit more height. This is somewhat negated by the toe overlap/slack handling issues this will bring about.

Back to the drawing board. I think I will try it with a riser bar fixed/ss rear 700c. With the funny wheel at the front and see how it goes. Cheers for the feedback:)

Just raise the front end up with a longer stem (vertically) and risers (4 inch risers if needed)? Why do you long to move to 2 x 700s?

Or just sell it so it can fulfill a purpose and buy something nicer/suited for the same money?

Yeah your right a taller stem is the way to go.

I already have a dedicated fixed gear bike. I bought this for TTing but as I say its not happening. I did try to sell it I was asking £325.00 which I thought was a bargain but no one was interested.

Hence trying to get the use of it as a fixed/ss toy!

£325 is nice!

If i had £325 i would be all over that! please dont slaughter it, its beautiful...

Apologies for another conversion question - and yes I used the search, but found nothing about dishing.

I'm building a bike for my lady, I've never done a ss conversion as I've always had track or flip flop hubs.. so in need of a bit help

I've got some 27" wheels with a 5 speed cassette on it. I went into Cavendish the other day to ask their opinion - thinking it was just a matter of spacing out the rear sprocket with cassette spacers until the chainline was straight (this is what my ss mountain bike has effectively)

They sort of made a "you're an idiot" bike mechanic face (we all know that face) and told me that I'd have to re-dish the wheel.. Do I really need to get the wheel re-dished?

http://www.63xc.com/dennb/redish.htm

thanks man, so the long and the short of it is - no I don't need to if it's got 120 spacing, but it would probably be better if I did?