1150A

I've got a 49x51 frame, and I recently raised my seatpost quite a bit cause I felt like I was a bit too cramped. There's about 6 inches of it showing, and it feels much more comfortable than before.

I've read around on the forums and have seen people comment negatively and say get a bike that actually fits..

The top tube length feels perfect, and with the seatpost as it is now feels great. But I'm not sure if I'll run into any problems? Is their any disadvantage to having that much seatpost showing vs having a bigger frame? (maybe a 51x51)

njm

Are you asking about safety/functionality issues? Or are you asking whether it really does look bad? Or whether looks are important?

To answer the last question, this is Bikeforums -- looks are paramount, duh.

rduenas

As long as there's still a good 3-4 inches of seatpost in the seattube past the downtube, you're fine.

Cheshyre

^^ agreed. just make sure that you've got an adequate amount of seatpost in the frame. otherwise, you might crack the frame.

1150A

Safety/Functionality issues.

Thanks for the tips! I will need to get another seatpost. It's in about 2.5 inches.

gascostalot

Look closely at the seat tube and you'll see an 'Minimum Insert' line. If you're below that, then you'll need a longer seat tube.

Ride Among Us

smaller frames are lighter and easier to manage. many racers use bikes that are too small. they do what you're doing and get a tall seatpost.

1150A

Would it be this vertical cutout right here?



Thanks for the help.

merlin55

the line needs to below the top of the seat tube. If you have 2.5 inches below the top of the seat tube on the steel, blue frame in the photo, you are fine

pirate golf

No. The minimum insertion line will be on the seat post itself, not the frame.

peabodypride

too much seat post showing? that's what she said.

awristawful

why would she say that

peabodypride

because he had too much seatpost showing

tynan

You can ignore the minimum insertion mark on the seatpost if you know what you are doing, it is a very safe guide for general consumption, it obviously does not (and cannot) know what frame you have so it will only ever be a guess by the manufacturer.

The seatpost needs to go far enough into the seat tube to go past the intersection of the bottom of the top tube and the seat tube - I would say an inch would be pretty healthy.

Beyond this point on the overwhelming majority of modern frames the butting kicks in and any further insertion of seatpost will not contact with the inner wall of the seat tube and thus offer no additional support.

tynan

Yeah, go and buy a longer seat tube.

gascostalot

Fixes everything.

rduenas

Welding is always something I've wanted to learn.

powerband

LOL.

mander

I can't believe it, a useful and informative bfssfg post.

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