I have a Ritchey WCS double road crank 48/34. I just took off the 48T outer chainring and moved the 34T chainring to the outside so I can use it as singlespeed. Problem is that now the chainring bolts are too long since I'm not using both chainrings. Are there shorter chainring bolts available? I'm new to this singlespeed stuff and any help will be appreciated.