Questions about singlespeed and fixed conversion.

[leeroy]

Hi guys,

New to the forum. How's everyone going?

I have some experience building proper track bikes, but at the moment
am doing a fixed gear conversion for myself, and a singlespeed
conversion for my girlfriend, both using old steel Healing frames.

I have some questions if anyone can help:

1. For the singlespeed, the original hubs are toast. For a
replacement rear hub, can I use any hub that accepts a freewheel?
What do you guys recommend...BMX hubs? I'd like to spend as little
money as possible.
2. For the freewheel, are BMX freewheels the way to go?
3. I will also need to replace the bottom bracket for the singlespeed
and possibly the fixed gear also. What's a reliable, cheap, sealed
cartridge bottom bracket you can buy in NZ that will give a 42mm
chainline?

Thanks for the help.

Lee

[Aaron Twemlow]

Hi.

 

Any Hub with a threaded side on it will be fine.(oldschool road hubs will have the threaded side.) Just amke sure the spoke hole count is the same.They will all take the std freewheel size thread as long as you keep it at 16tooth and above. Anything 15tooth and lower will have a smaller ID.  Any brand freewheel is fine eg-dickta,shimano,ACS. Dickta being the cheapest.

BMX hubs are good but usually come with bigger axles like 14mm and that wont fit in your std 9mm or 10mm dropouts and the spacing is also at 110mm which is a lot of "cold Setting" for your healing frames to take, which would be about 126mm.

As for the BB any new std cartridge BB will be fine. Someone else is going to have to help you with the "42mm chainline" .

For the chainline fit any BB and drive side crank and ring then put a straight edge or chainline tool against the front ring and run it down to the rear hub this will determine if you can put a narrower axle BB in if at all. It will also tell you how much spacing over you will have to do on the rear hub and how much dish you may have to do to the wheel .  

 

Where is this email coming from and how come I get them?

 

Cheers

Aaron

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[leeroy]

Hey Aaron,

I think you must be a member of the Fixed Gear New Zealand Google
Group, and whenever there are updates you get email notifications.

Thanks a lot of your help. I will do some more work on the bikes and
scouring for parts and let you know how it goes.

Cheers,

Lee

On Aug 28, 5:47 pm, Aaron Twemlow <surl...@gmail.com> wrote:
> Hi.
>
> Any Hub with a threaded side on it will be fine.(oldschool road hubs will
> have the threaded side.) Just amke sure the spoke hole count is the
> same.They will all take the std freewheel size thread as long as you keep it
> at 16tooth and above. Anything 15tooth and lower will have a smaller ID.
> Any brand freewheel is fine eg-dickta,shimano,ACS. Dickta being the
> cheapest.
> BMX hubs are good but usually come with bigger axles like 14mm and that wont
> fit in your std 9mm or 10mm dropouts and the spacing is also at 110mm which
> is a lot of "cold Setting" for your healing frames to take, which would be
> about 126mm.
> As for the BB any new std cartridge BB will be fine. Someone else is going
> to have to help you with the "42mm chainline" .
> For the chainline fit any BB and drive side crank and ring then put a
> straight edge or chainline tool against the front ring and run it down to
> the rear hub this will determine if you can put a narrower axle BB in if at
> all. It will also tell you how much spacing over you will have to do on the
> rear hub and how much dish you may have to do to the wheel .
>
> Where is this email coming from and how come I get them?
>
> Cheers

> AaronOn Sat, Aug 28, 2010 at 3:48 PM, leeroy <kid.leet...@gmail.com> wrote:
> > Hi guys,
>
> > New to the forum.  How's everyone going?
>
> > I have some experience building proper track bikes, but at the moment
> > am doing a fixed gear conversion for myself, and a singlespeed
> > conversion for my girlfriend, both using old steel Healing frames.
>
> > I have some questions if anyone can help:
>
> > 1.  For the singlespeed, the original hubs are toast.  For a
> > replacement rear hub, can I use any hub that accepts a freewheel?
> > What do you guys recommend...BMX hubs?  I'd like to spend as little
> > money as possible.
> > 2.  For the freewheel, are BMX freewheels the way to go?
> > 3.  I will also need to replace the bottom bracket for the singlespeed
> > and possibly the fixed gear also.  What's a reliable, cheap, sealed
> > cartridge bottom bracket you can buy in NZ that will give a 42mm
> > chainline?
>
> > Thanks for the help.
>
> > Lee
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Fixed Gear New Zealand" group.
> > To post to this group, send email to
> > fixed-gear-...@googlegroups.com.
> > To unsubscribe from this group, send email to

> > fixed-gear-new-ze...@googlegroups.com<fixed-gear-new-zealand% 2Bunsu...@googlegroups.com>
> > .

[Andy Gallagher]

I dont know how i got that either. Are there any fixe groups in chch that meet up for rides?
 
Im keen to meet some other people with them.
 
Andy
 

---

Date: Sat, 28 Aug 2010 17:47:12 +1200
Subject: Re: Questions about singlespeed and fixed conversion.
From: sur...@gmail.com
To: fixed-gear-...@googlegroups.com

[martinv]

As input for your question #3, I use the cheap (I'm pretty sure it's
called VP brand) ones you can buy at most bike shops. They're around
$30, and come in many widths. I have found that it's best to take the
bike+(crank & chain ring together) to a bike shop and they will find
the right length BB to give the required chain line of 42mm (if you
really want it to be 42mm). You can go to the shop and just buy the
BB, but I have found that the spacing from the right hand of the
bottom bracket shell the to right hand end of the bottom bracket can
vary, even though the overall length of the bottom bracket might be
the same. ie. there is an offset, which they don't tell you on the
box... Take the frame in and try different ones. From memory
something like 108-110mm width BB is a good place to start. Make sure
your chain ring doesn't rub on the rear chain stays when mounted!

See the article on the Vitus on the website for more.

-Martin

[leeroy]

Hi Martin,

Thanks for the help. The frames are currently getting powdercoated,
so will have to wait before I can go and try out some BBs.

The reason I wanted the 42mm chainline is because I managed to get a
set of track wheels pretty cheap off trademe.

If the chainring rubs on the chainstays at 42mm, I will have to get a
longer BB and also respace the rear cog, is that correct?

Thanks,

Lee

[martinv]

On Aug 30, 8:42 pm, Andy Gallagher <pinecone...@hotmail.com> wrote:
> I dont know how i got that either. Are there any fixe groups in chch that meet up for rides?
>
> Im keen to meet some other people with them.
>
> Andy

Not sure now, but before winter there was a group that met about
6:15-6:30pm on Thursdays in the Cathedral square. With all the rain I
haven't cycled in ages (shame on me!) so don't know if there are still
hardy souls turning up. :-)

[martinv]

On Aug 31, 11:29 am, leeroy <kid.leet...@gmail.com> wrote:
> Hi Martin,
>
> Thanks for the help.  The frames are currently getting powdercoated,
> so will have to wait before I can go and try out some BBs.
>
> The reason I wanted the 42mm chainline is because I managed to get a
> set of track wheels pretty cheap off trademe.
>
> If the chainring rubs on the chainstays at 42mm, I will have to get a
> longer BB and also respace the rear cog, is that correct?
>
> Thanks,
>
> Lee

A rear track wheel will be 120mm width so you might have to 'adjust'
your frame drop-outs to match.

What you say would be one option. You might also be able to get away
with a smaller chain ring and smaller rear sprocket, giving the same
overall gear. That is, if the rubbing isn't too pronounced.

Cheers,

-Martin