Please help!
 

I'm trying to convert an old bike to a fixie, but alas, it vas vertical dropouts.
I need an eccentric bb, but is there any eccentric bb that will fit on a frame that uses a 68x113, thank you so much if you can help me.

An alternative is a tension device. If you search single speed tensioner, several links show up.

Beat me to it, Lynn.

Better off to buy the kit that goes on the dropouts and adjusts chain tension that way.

Or figure out the right combo of cog and chainring size plus chain half links that'll give you enough chain tension.

Ha! The OP won't figure that one out.

White Industries eccentric hub:

http://static1.squarespace.com/stati...+Version+2.jpg

ENO ? White Industries

Ooooh! Looks expensive.

Still, that would look a lot nicer than a chain tensioner tacked on. That always ruins the "clean" look of a fixie, and makes me roll my eyes and think "Ya just couldn't find a frame with horizontal dropouts, huh?"http://www.zoominto.com/zoomapi/ZoomButt.gif

Not to mention, a chain tensioner won't work with a fixed gear.

Duh. And I knew that. :bang:

Oh, that's right. Even the unsprung ones can't handle the back pedaling force. Guess the ones I've seen pics of were single speed freewheel bikes. Still looks goofy.

There is the Philcentric bottom bracket and you may still have to use a half-link. The added kicker is it is for outboard bearings only so you are limited to the crank you use but it will work.

Thank you all for your replies! Also Timmyt, I think I'm almost there it's either 16x43 or 16x44. No w need different advice, do I NEED perfect tension? One ratio is super tight, no slack, and the chain makes noises, the other is really slack, but the chain stays on decently. If I had to pick, what should I go with? Too tight or too loose? Can this hurt my bike? (Also I can't use a tensioner because it's a fixie)

Folks are helpful here, but you might want to try the Singlespeed and Fixie forum instead of C&V next time.

I'd go single speed, or get a different frame.

My first thought as well. hahahaha

do you know about half-links?

http://i.ebayimg.com/images/g/2yEAAM...mu-/s-l500.jpg

KMC 1 2 Link Half Link for 1 8" Bike Chain Z410 OL Fixie BMX Single Speed | eBay

I think the chain should be loose enough to move a half inch or so up and down. Having it too tight is inefficient and feels pretty terrible. Having it too lose, it can come off. If you go this route, keep it well lubricated, because it won't take much wear to mess up the perfect chain tension.

I am actually using a half link chain :thumb: I think I'm gonna go with the looser of the options, but I ordered a 44t chainring, if it's loose at 43t do you thing it might end up just right at 44?

Here's the bike right now http://bikeforums.net/attachment.php...hmentid=518039

Of course that's what the bike looks like.

The chain is far too loose.

Did I just hear ****s get fired? xD

Do you think a 44tooth ring would fix this?

No. The 44T ring won't fix that, but it might make the chain tighter. :roflmao2:

Ok, so you don't really know? I'm hoping it might make perfect tension... Is that unrealistic?

I see what you did here :D
OP, post in singlespeed but make sure you have thick skin.

What do you mean?

When newbies ask questions in the SS/FG forum they are usually hazed like new fraternity pledges. ;)

It's a ritual there.

I personally think we should start telling people that they can cut a horizontal slot in their vertical drop outs and use that for chain tension. Not only would it make them purchase a new frame (one with horizontal drop outs no doubt), but darwin may even take care of a few of them...

I mean honestly, it's the first thing that ANY fixie guide has. MAKE SURE THE FRAME HAS HORIZONTAL DROPOUTS. Is it really that hard?

I've come to the conclusion that the vast majority of fixie riders don't follow logic.......

Everyone starts somewhere so I'd cut OP some slack. And on the subject of dropouts - vertical is not such a big deal, just use WI eccentric hub, half link, magic gear, etc. Built many bikes that way, no complaints. Sometimes frame is so good or people simply attached to it and WI hub or similar solution works.
OP already posted is SS forum and as I said there - I'd start looking for another frame. Not because of the droputs but simply because I would personally start with the frame designed for 700c (or similar size) wheels.

Singlespeed & Fixed Gear

OP, you have a dropout, so a chain tensioner is the easiest thing to do with vertical dropouts. It sounds like you need a 43T front, not a 42T or 44T. 43T chainring | eBay

Also, if your chain pops, how are you going to stop? Many municipalities have requirements for a front brake.