On One Pompino owners...

Soma Clarence

Narrower washer.

Also kev, you need a picture of jimmy with two thumbs up... You should be giving discs two clavicals up.

Bit of advice needed (might be the wrong thread for this but anyway....)

I keep dropping the chain on my Pomp. It comes off the chainring, the freewheel and sometimes for extra excitement, both at the same time. This happens most often when I'm out of the saddle accelerating, but has also occurred over rough bits of road. I'm concerned about a testicles / top tube interface.

I think the chain tension is fine - there isn't any droop in the chain to speak of. My drivetrain consists of a 1 1/8 chain and freewheel (I assume the freewheel is 1 1/8) and a 3/32 chainring. I ride a 44/16 ratio.

Is it just a case of taking time to really, really yank the rear wheel back in the dropouts and then tighten as far as it will go? Or is there something else I can do?

Is your chain line straight? It might be tension related, you want the chain tight but there should be an inch or so of play as any tighter will wear everything out much quicker.

It is straight-ish, as in it isn't noticeably out of alignment. It was really out but a new BB cured that and also stopped the chain from coming off so much for a while. Regarding tension, if you push the chain down by the chainring it you cant get it onto the next tooth, so it must be fairly tight.

The freewheel (a shimano one) has become slightly more noisy recently, dunno if that could have something to do with it.

Such confuse.

You're running a road chain ring with track chain? Maybe this?

Yeah I guess it could be. I know someone with a 1 1/8th chainring so I might borrow it and see if it keeps happening

Really take time and get your chainline straight.
1/8" chains are often made with bushings and therefore less flexible to the sides. A non straight chainline will lead to drops.

Here's some advice on the problem: http://sheldonbrown.com/chainline.html

Thanks for the link - will take a look and see if there is anything I can do about it. It's certainly putting me off riding fixed, don't want to lose all my teeth if the chain drops!

Would it be possible to run a standard Nexus 3 speed IGH on a Pompino? Anyone tried it?

You could run the Shimano SG-3C41 and SG-3R40 hubs as they are 120 mm spaced.

https://web.archive.org/web/20130925001938/http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0015-downloadFile.html/08%29%20Hub%20Dimensions.pdf

Sachs/Sram make a 3speed hub that's 120mm spaced though the 2 I've owned have both had coaster brakes attached.

There's also the Sram P5 that's 5 speed and 120mm spaced.

Coaster FTW

There's also the Sturmey Archer S2 2-speed kick-shift thing.
The freewheel variant is 120mm spaced. Needs no additional cables either.

Finished for now - still tweaking position and there are a couple of issues to fix, but they need to wait till funds allow me to do so!

I am enjoying a peaceful, 80% traffic-free commute, and also learning how to actually handle a bike.

Size small? If so, wheelbase? Thats something that really bothers me.
Also, tire clearance? Web says would fit 35c but I actually think it can get a bit more.
I'm also getting funds and collecting parts here and there to get one built.

Yup, it's a small. Toe overlap is ridiculous and fitting the rear canti was a ballache. I 've got 32c on a 23mm rim and there's heaps of space...

built mine today. Still needs mudguards though.

Super cool. I'm as yet undecided on whether to chuck a rack on mine... :/

I did - commuting without a backpack is great!

Can anyone recommend a similar frame for smaller wheels - mountain bike size wheels?

Nothing? Would it have to be built to order?

The on one inbred is similar looking to the old Pompino. Designed for 26" wheels, 2 dropout options, 135 rear spacing and disc only. Much slacker geo though as it's a MTB frame.
A lot of the polo frames are for 26" wheels, but the geo is much tighter than the pomp and they're considerably shorter too. Cheap options are hija de la coneja and fixie foxie. IMHO the fixie foxie is lighter and looks better. They also build to order so you could get some alterations to the stock frameset.

Thanks very much. That will give me something to look at. I like the 120mm spacing and mudguards are essential (its my transport). I see the Inbred with only a vertical drop-out option on the on-one website. The Pompino V4 is very tempting at £130...