I managed to bend the tensioning screw on my genesis io ss. Since they appeared to be made of cheese I decided to upgrade to some surly tugnuts… However I think these are essentially the wrong way round for my dropouts which have the opening at the rear. Whilst they fit in the dropouts the tensioning screw would push the wheel forwards. Does anyone make a tugnut for dropouts with the gap at rear of the dropout?

Or am I being a mong and missing something?

There is something intrinsically pleasing about the word 'tugnuts'.

That is all.

HTH.

The Tugnut is designed to pull the wheel back.

On-one chain tensioner. Or I saw some 99p ones in Cycle Sense in Tadcaster

surely the screw pushes against the frame, not the wheel?

I think the Io tensioners have confused the OP as they push the wheel back from the front not pull the wheel back from the rear.

The Tugnut will work fine when mounted as in the picture in my first post.

Doh! Yep, I was being my usual, mechanically inept self…

From the quick play I had with them I assumed that only the bolt moved through the solid tugnut which would indeed push the wheel. Now it's been pointed out it's obvious that the bolt actually pulls the tugnut back.

Thanks guys, much appreciated. I keep trying to do my own fettling but I'm obviously not that way inclined – which is an arse as I am very good at breaking stuff!

I keep trying to do my own fettling but I'm obviously not that way inclined

At least you understand when shown.

Which is more than some folks do. 😉

IvanDobski – where did you get the wing nuts from. what size etc. I have managed to bugger the originals on my io Id and would like something more user friendly

regards