0
21 is probably the measurement in inches, which works out as 53 cm. Trouble is, there's no telling if this is the top tube length or the seat tube length. For a road bike, it's probably the seat tube height for a mid-sized bike. If it's seat tube for a MTB, it'd be a big bike.
Still curious? Ask our experts.
Chat with our AI personalities
MaxineI respect you enough to keep it real.
Chat with Maxine
LaoThe path is yours to walk; I am only here to hold up a mirror.
Chat with Lao
JudySimplicity is my specialty.
Chat with JudyAdd your answer:
Earn +20 ptsQ: What size is a 21M bike frame in inches?
Write your answer...
Submit
Still have questions?
Trending Questions
If you were to use reusable cloth bags when shopping approximately how many plastic bags would NOT be used over a lifetime?
Plant cells store waste products in this large membrane bound space?
Can you overdose on electrolyte powder?
Is pole vault a track or fiend event?
What are the 2 parts of badminton grip?
Where can you dispose of leaves?
What are the differences between a chain lock and a U-lock for securing a bicycle?
What types of bikes does Felt Bicycles make?
Can a gymnast have glasses?
Why are very few glass bottles reused?
What are teeth on bmx?
How many miles would you consider a lot to ride on a bike?
What are running sheos?
Who has Serena Williams dated?
What are the benefits of using a recumbent bike for cardiovascular exercise and how does it compare to other types of stationary bikes?
How can you waste water if it gets filtered and recycled?
Can you dump asbestos?
Can junk mail be recycled?
How do you get more distance from my13 degree loft golf club?
On the toilet bowl cleaner bottle it says throw away empty bottle in trash but on the bottom is has the recycle symbol why?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.