This issue caused me an awful lot of pain with my old raleigh. if you're not careful, doing it wrong will result in the chain potentially pulling the rear wheel into the side of the frame when stomping hard on the pedals, causing a skid at the least or more likely throwing you over the handlebars. I always super-tighten my wheels now...
This would be particularly important if your friend isn't an experienced cyclist. that i think is why i hurt myself anyway!
This issue caused me an awful lot of pain with my old raleigh. if you're not careful, doing it wrong will result in the chain potentially pulling the rear wheel into the side of the frame when stomping hard on the pedals, causing a skid at the least or more likely throwing you over the handlebars. I always super-tighten my wheels now...
This would be particularly important if your friend isn't an experienced cyclist. that i think is why i hurt myself anyway!