I’ve been interested in starting a project gravel bike and found a Cannondale M400 for $20. How do I measure if a frame is suitable for a dropbar conversion? I have a Claris groupset from an old bike that I can throw on, so I would potentially only need to buy new handlebars and a chain. My concern is whether I’ll be comfortable in a drop position. Is there a way to measure that?
by Proud-Psychology-415
7 Comments
They’re all good frames, Brent.
A good place to start would be to measure the frame and then compare that to a drop bar bike in your size.
Measure the top tube. Some old mountain bikes have absurdly long ones while having a relatively small seat tube height. They are intended to be used with straight bars, so the reach is different to a drop bar bike. Add stem length and drop bar reach and you get an idea of how long the bike will be. If it’s too long, you will need to work with a shorter stem.
This is why stems of different lengths exist, as well as rails on saddles.
I’m taking the other position and suggest a big frame to get more stack and low seatpost extension. You’ll still need a high and short stem to make drop bars work
Good to go👍 https://alexscycle.com/products/dixna-neither-2-riser-drop-bars#rapid_reviews_items
Almost any frame could work. Position the hoods above/slightly ahead of the axle and give it a whirl. You’ll know instantly if it’s working or not. Change stem height with spacers and/or stem rise (angle) to get right height in relation to saddle. If using an old MTB frame you’ll need a long stem. There are no wrong answers just what feels right.