My first build - questions!

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flynck

flynck

New Member
Hey, I'm building my first bike from scratch and I've got a few questions, if anyone is feeling kind enough to help me out!

1. I need to buy a new BB as the current one is 127mm which is pretty long for a single fixed build, right? So what size BB should I buy, and what sized crankset should I get to go with it??
2. I'm going to set it up as a standard 42t/16t - how can I make sure that the chain alignment is correct between the back wheel and the chainset (I'm assuming that's based on the spacing on the back wheel hub, right?)
3. Can anyone recommend a good, light 26.8 seatpost?

Because this is my first build, is it worth just buying a set like these (to my specifications):
http://singlespeedcomponents.co.uk/singlespeedkits/prem-silver-silver.html
That would make it easier, as the BB/crankset come together so I know they would be right, and then the alignment wouldn't be an issue as I would buy the wheel with the hub and the cog already one it...

Please shed some light - this is my first build and I don't want it all to fall apart while I'm riding! (Obviously I will have it checked over by a mechanic before getting on..). I've been riding fixed for 2 years now, so that's not an issue.. The fact that fixed-gear is so simple, I've never had to learn how to assemble one myself! Please excuse my ignorance...

THANKS IN ADVANCE!
 
biggs682

biggs682

Itching to get back on my bike's
Location
Northamptonshire
from memory s std ish single speed bottom bracket is 115 mm and then depending on what style hub either dish or space to give a good chainline .

go and have a chat with your lbs if in doubt

@flynck where you based ?
 
D

Deleted member 1258

Guest
flynck said:
Hey, I'm building my first bike from scratch and I've got a few questions, if anyone is feeling kind enough to help me out!

1. I need to buy a new BB as the current one is 127mm which is pretty long for a single fixed build, right? So what size BB should I buy, and what sized crankset should I get to go with it??
2. I'm going to set it up as a standard 42t/16t - how can I make sure that the chain alignment is correct between the back wheel and the chainset (I'm assuming that's based on the spacing on the back wheel hub, right?)
3. Can anyone recommend a good, light 26.8 seatpost?

Because this is my first build, is it worth just buying a set like these (to my specifications):
http://singlespeedcomponents.co.uk/singlespeedkits/prem-silver-silver.html
That would make it easier, as the BB/crankset come together so I know they would be right, and then the alignment wouldn't be an issue as I would buy the wheel with the hub and the cog already one it...

Please shed some light - this is my first build and I don't want it all to fall apart while I'm riding! (Obviously I will have it checked over by a mechanic before getting on..). I've been riding fixed for 2 years now, so that's not an issue.. The fact that fixed-gear is so simple, I've never had to learn how to assemble one myself! Please excuse my ignorance...

THANKS IN ADVANCE!
Click to expand...

You could try E-Mailing singlespeedcomponents. and ask for the information about the BB axle length and what taper the chainset is, I'm guessing its a tapered one, if its a JIS taper a shimano un54 bottom bracket is worth looking at.

Theres an interesting article here about chainline
https://www.velodromeshop.net/index.php?p=page&page_id=chainline

Our friend Sheldon Brown is always worth a look at, there a lot of useful information on there http://www.sheldonbrown.com/fixed.html
 
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