Right size is key. Everything else is second to that.
Bicycles
Welcome to !bicycles@lemmy.ca
A place to share our love of all things with two wheels and pedals. This is an inclusive, non-judgemental community. All types of cyclists are accepted here; whether you're a commuter, a roadie, a MTB enthusiast, a fixie freak, a crusty xbiking hoarder, in the middle of an epic across-the-world bicycle tour, or any other type of cyclist!
Community Rules
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No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia.
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Be respectful. Everyone should feel welcome here.
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No porn.
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No ads / spamming.
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Ride bikes
Other cycling-related communities
Some bike shops sell trade-ins. It might be at the high end of your budget, but someone will have gone over it to make sure it's in working condition.
Steel frame in good shape from a quality manufacturer with easily sourced parts. Stick with major reputable manufacturers like Trek, Marin, etc. If you can get something with disc brakes, great! If not, v-brakes are what I've got on mine commuter and they work just fine (I recommend Koolstop for brake pads).
Check everything over for damage or wear, fix up or replace whatever's wrong, and enjoy a bike that will probably last you for the rest of your life: Steel is real!
Give the bike a test ride and make sure it fits you. The main problem will be if the bike is too big. Too small is better than too big.
The other consideration is condition. You want to make sure the shifting work through all the gears. There's no visible rust. Make sure the drivetrain doesn't squeak or creak. Make sure you can't jiggle the cranks side to side. Make sure the brakes work. Make sure you can adjust the seat height. Seatpost can get seized in the frame sometimes.
If you don't have to worry too much about hills, I recommend a single speed bike. There's no gears to worry about and single speed chains are more robust.