[stucky]

Hi all, I’ve got a 2013 A1 Allez that needs a new chainset. I’ve decided for a tiagra 4700 (105 5700 shifting), which uses a HollowTech II type BB, I’m just not sure if it will fit the frame? Do I need any conversion tools or something?

 

Thanks

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[stucky]

Thanks SpikeBike. I was only

Thanks SpikeBike. I was only afraid that I’d buy the chainset and BB and then it wouldn’t fit, for some reason. Right now it has one of those without the external cups,not sure if that’s relevant. I will definetely have the lbs fit it

[AfterPeak]

I had a 2014 Allez (not sure

I had a 2014 Allez (not sure about the 2013) but it has a BSA English threaded BB. The HollowTech II will just screw into the frame. Then the crank will just slot in. You are best off replacing the current BB now while you are replacing the crank. If your chainset doesnt come with a new BB then you will need to get one (https://www.wiggle.co.uk/shimano-bb-r60-ultegra-6800105-5800-hollowtech-ii-1/). I would recommend getting your LBS to fit it all though. They will clean it all up and put in your new one and have the right tools to tighten it correctly.

 

You can do it yourself but you will need some tools. You will need a Shimano Crank Installation Tool, a bottom bracket tool (might need an adaptor (TL-FC25 ) if you get the wrong one like me :)) and a torque wrench and some grease. 

[Author]

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