Hi all,
I've got some Sram level brakes. Due to me being off the bike for a bit I'm a bit heavier than I normally am.
Can I put some larger calipers on to increase stopping power?
Yes
What size are your discs? I would try going larger with them if you could.
To be a bit more constructive, the Guide calipers will work with the level levers.
But as others have said try upping your rotor size. If you're running 180/160 upgrade to 200 at the front and pop the 180 on the back. You'll need new post mount adaptors as well.
I wouldn’t mess about changing calipers only - you can often get Guide RE or Code R for £50 an end. In particular the Code R have much bigger master cylinders that manage heat better - but the RE have decent power too - although the levers aren’t as chunky.
Code R:
https://www.bike-components.de/en/SRAM/Code-R-Disc-Brake-p56587/
Guide RE:
https://www.orangebikes.com/shop/components/brakes/sram_guide_re_brakes
Guide RE is just a guide lever with a previous gen code caliper anyway.