edmundane agree with jos, how far past the limit is it on the seatpost? it's 653 thin man, better not risk it.
Does 653 have butting of any kind ? (apologies for my ignorance on steel frames)
Once the post is down around an inch past the seat tube / top tube intersection there is nothing to be gained by driving it further in - as the butting means the post is not supported past this point.
Does 653 have butting of any kind ? (apologies for my ignorance on steel frames)
Once the post is down around an inch past the seat tube / top tube intersection there is nothing to be gained by driving it further in - as the butting means the post is not supported past this point.