larger chainings for SRAM AXS (road)

I’ve got a sram rival axs chainset, which came with a 48t large chainring. I don’t have a axs rear hub, so my smallest cassette cog is an 11t.

This ratio is a bit small for me, and I’m frequently spinning out. Does anyone make axs compatible chainrings in traditional sizes (say 53t) which don’t cost a rediculous amount? Traditional BCD chainrings are common on the aftermarket, but I’m not finding much for 107BCD

You have two choices. Rotor round chainrings with a bcd of 110×4 or Praxis Works Buzz chianrings that are 110×5 bcd. The spiders will need to be SRAM 8 bolt and can be obtained from Aliexpress, possibly ebay. Stone is a brand to look for that manufactures both of these BCDs. Alternatively buy an XCadey powermeter: https://xcadey.uk/shop/xpower-s-sram-8-bolt-110bcd-4s

Both chainring options are expensive but both have been designed to work with the flattop chain which is completely different from other chains. I can vouch for the Praxis chainrings that change from ring to ring very smoothly indeed.

You will encounter a problem with your front derailleur. It is only compatible with the 48T chainring since the block into which the braze-on hanger screw screws into, is too low. I circumvented this problem by drilling and tapping an additional screw hole lower down, below the original screw hole which allows the derailleur to be raised enough to work with the bigger chainring. This was with a Force derailleur. Your Rival derailleur will be the same. I don’t think even the Red has an additional hole. There is an easier way around this….purchase the Rotor QXL Bracket (Front Mech Extension Kit).

thanks for all the info, glad someone has been here before 🙂

that’s a good pointer on the spider, I hadn’t realised that the 107bcd thing wasn’t built in, so it gives me some avenues to explore. I’ve got the old chainrings that are 110×5 bcd i can throw on, so that might be a sensible move

also an insteresting point on the flat-top chain. I hadn’t realised it was different and am running a bog standard 12-speed chain on the rival chainring/mech without any issues. perhaps there’ll be some accelerated wear over time?

My frame’s got a band to adapt it to braze-on so I can move that up without any issues fortunately.

I’m surprised you are spinning 48 x 11 out which is 114.6 inches as I have 53 x 13 which is 107 and can’t outspin it, and live in the Peaks – it’s usually faster to tuck in.

Do you grind a bit or can you spin 100 rpm or more easily ?

I’m surprised you are spinning 48 x 11 out which is 114.6 inches as I have 53 x 13 which is 107 and can’t outspin it, and live in the Peaks – it’s usually faster to tuck in.

Do you grind a bit or can you spin 100 rpm or more easily ?

at the moment the chainset is on my touring bike, and at 80rpm I’m doing 27ish mph. its not really an issue there. I can spin faster, but it feels a bit un-natural

I’m thinking about putting the same chainset (because it has a power meter) on my TT bike, which also has an old hub. on a slight downhill I am regularly pedalling that over 30mph, so I don’t want to drop from 53t to 48t on that bike.