Can I convert a Shimano 9-speed Tiagra to a 10 speed?
My road bike has a Shimano 4500 Tiagra 9 speed shifter. After 6,000 miles, it's starting to show some wear and I need to replace it. All my other components are 105. Since I'm going to upgrade, I was thinking going to a ten speed. Will a 10 speed cassette fit where the 9 speed cassette was? They are Bontrager wheels.
If a 10 speed cassette will easily fit, I'll upgrade to a 10 speed shifter, cassette and chain and of coarse rear derailleur
1970 Raleigh Tourist, 1972 Raleigh Sports, 1984 Miele Road Bike SS, 1985 Bianchi Nuovo Alloro, Cannondale F400, Opus Avro 29er, Jamis Sonik, Blue CXC, Bianchi San Jose, Cervelo SL-SLC, Cervelo S3 Di2 and a wife that loves me!