chainging sti shifters

imsimon

hello all,
ive just purchased (through here) some 105 10 speed shifters to replace my current 9speed sora sh1t for a 2010 specilized allez. im also going to get a new 10 speed casette and 10 speed chain.
will the cables currently on my 9 speed simply connect up or will I need to buy new cables as well?
I think im right in saying the current tiagra rear mech will be ok with 10 instead of 9?

does anyone know of a good step by step guide for changing the shifters for someone who hasnt done much work on a bike before but im quite happy to have a go!
I know I will also need new bar tape

is it a relatively straightforward job or am I just better paying a bike shop to do it all for me?

thanks in advance

si

essjaydee

Have a look here http://bike.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.html

It's an easy job to do. You might not need to replace your bar tape. I didn't when I changed my shifters, but the bike was fairly new. You will have to adjust the rear mech. Again easy to do and info found in link above. how old are your cables? If they have had a fair amount of use, then replace them.
Tiagra rear mech will work fine. It's the shifters that control how much the rear mech moves between gears, Indexing it's called.

Hope this helps and you can find some good info by searching on youtube also

imsimon

thank you! I think I'll give it a go rather that just give it to the bike shop. I dont really know anything at maintaining a bike but theres only way to learn!
bike has probably done less than 1K, I'll probably leave the cables

thanks again
si (off to study youtube!)

essjaydee

Just check the cables when you remove them and ensure they are in good condition. If they have started to unwrap (frayed) or there are signs of wear, then replace them.

If you can use a screwdriver and allen key you will be fine, and it's the best way of learning about your bike and how to carry out repairs. You might need these skills out on a ride some time