Polo/robust chain tensioners

perhaps if you got some really long screws...

yes.

yes.

Long screws works a treat. I locked up a sawn off like that & used off-road for about a year. Never threw a chain.

i have used the dmr tensioner on both on road and off road ss bikes i found it to be quite reliable but found a better solution with http://www.wiggle.co.uk/surly-singleator-chain-tensioner/ because there isnt a sprocket on the dmr just a runner i found if there is too much abuse it can still skip out accidently whereas while i had it i never managed to loose tension with the surly, although i do still keep a spare dmr tensioner just in case because they are sooo simple

Thou, most people (well me) would go with a chain rensioner to avoid having to spend on a horizontal drops, so £30 feels like quite a lot. unless you're on a expensive frame......

I ran a chopped derailleur as a ghetto single speed mod for my what was then my work bike. Worked fine for about a week 'til a workmate dropped his bike on it, making me think it might not be a long term sturdy option for a polo.

Used a DMR tensioner for a few months, didn't have any problems with bolts stripping/similiar and it seemed pretty tough. Sadly someone effing nicked it!

Currently using the Superstar option. Been on my street/jump bike for 3 months which takes a fair hammering not disimiliar to polo and it's been fine, tho' it's a wee bit noisy. Also got a nice wide roller that gives you a bit of flexibility on chain line. I reckon a bit of a bargain for a tenner!

Could be a good way to spend the box filled of derailleurs that everyone ends up with

DMRs are a slightly different setup. It actually gets attached at 3 points. You put your QR skewer through it which is why it's a bit of a pain changing wheels. Mine was well built and you'd have to be extremely cack-handed to fuck up any of the bolts.

do you need qr for it?