Problems after changing rear wheel
Hi - first post! I recently purchased a new pair of wheels. Took cassette off old wheel and put on new wheel. All went fine until out on the road. Now when I'm on the 50 ring I can't get into the biggest gear on the cassette ie the 25 on my 25-12. Just refuses to move across. Tried fiddling with barrel adjuster but just different amounts of clicking but no 25 gear. Grateful for any inspiration to fix..