650c Fork change to 700c Fork?

[Mr Weirdo]

Hello

I have seen a Time Trial frame for sale with no forks. The seller advisers that a 650c fork is required to use the bicycle for Time Trials.

Question: Is it possible to use a 700c fork instead or will it effect the geometry of the frame or just not work?

Thank you...

 

[mdvineng]

700c would be a slightly larger diameter, increasing the trail and head angle. For road use in recreation etc it wouldn't really be noticeable but for time trial use, it wouldn't be as efficient.

 

[Mr Weirdo]

Thank you so it would work...thanks for your reply! I was going to use it for recreation/fun.

 

[brocklanders023]

Pretty sure it would be fine. My gravel bike came with 650b wheels but the manufacturer states that I could use 700c in the same frame and fork without issue. Only thing to be aware of is the width of tyre you can use.

 

[Mr Weirdo]

Thanks for your answer. The thing is I sent the seller an email and they replied there would be an issue with geometry when set up.

Also the frame size is approx 47cm c-c but with the seat tube extended it would take it up to 54cm. Even if it did work with a 700c fork on it couldn't it look a bit undersized/odd as I am 5'10"?

Thank you...

 

[mdvineng]

You would need to see the geometry of the diamond to tell. Some TT frames are on the extreme side for converting to general use. 56cm in a standard frame would be OK for your size.

 

[Mr Weirdo]

Thank you...I'm learning new things all the time especially about the geometry of a bicycle frame ie how a TT frame differs from a road bike, etc. Now I have to look up ' diamond' and learn about that so it's been a bit of and education. Thanks for the info

 

[mdvineng]

Diamond is just the term for a std bicycle frame layout

 

[Mr Weirdo]

Ta...I'm still learning lol