They come in three sizes. I bought the smallest - 20mm. Basically, you just take off the pedal and put this steel 20mm spacer onto the crank arm and then screw the pedal to that. It is very strong. I don't feel any flex or anything. I think they were invented for folks who have different physical issues - like their heels hit bike. Or folks who have to toe out more - something that would perhaps be good for me with the ITB issue. I haven't had any knee or hip pain while riding. I'll be going out again tomorrow.
It is so awesome to be able to turn without fear. It was really getting in my head. I'm going to replace my 34's with 32's. Then I bet I won't even brush the tire!!!
Thanks for the tip about the pedal spacers, gidget. I'll try and find them for my partner whose right ankle consistently hits the crank...
Far as CX goes I had a very strange race on Sunday on frozen grass and mud. Lots of falls in the corners and you had to hang on for grim death when descending. Ice patches were getting polished into something like glass with the passage of 98 riders. There was also a fearsome-looking snowy bank that was actually quite easy to ride up if you really attacked it. Great fun. I used 30mm clinchers @55 psi, file tread on front, studs back. No falls or flats - plenty of slips though. Finished 60th, well pleased with that. I got beat by a chap in running shoes riding an old bike and wearing shorts! I'll probably join a local club for neaxt season, it would be nice to compare notes with people after the race...
You can get them online. I bought them where I bought my bike and they were only 19.99. Online I see them around 40.00 I think. Don't know the difference - perhaps online they are higher quality metal (lighter?).
Your race sounds unbelievable!!! I see you are in the UK. And I think I heard on the news you all had a freakish snow event! WOW! Sounded like a nail biter for sure!! Studded rear tire! That is an event!!!
Yes, I think joining a club is the way to go. My LBS went out of business this year so there are not a lot of local contacts.