Sram chainring replacement.

[Tony.OK]

While cleaning Trance the other day I was surprised how worn the front chainring was after about 800km, replacement in NZ is about $100nzd so thought I'd try a cheap alternative at $25, cant be much softer than Sram one....

Easy as to fit, pedal off, MRP chain guide off, unbolt chainring, dont drop the ring nuts, re-use in new ring, the ring can be rotated and threaded over crank spider.....simple!
When refitting new ring you can get nuts in easily if hole is at 6 o'clock or use tape to hold them in.
Hardest part is the nut for the mrp chain guide, I used little finger to hold nut while remounting the chain guide.

Job done, ready to ride, even if it lasts half the life of Sram ring it'll be half the price.....a stainless ring would prob be ideal but at $165 I'll try this option first.

 

[Mat_Ron]

While cleaning Trance the other day I was surprised how worn the front chainring was after about 800km, replacement in NZ is about $100nzd so thought I'd try a cheap alternative at $25, cant be much softer than Sram one.... View attachment 12117
Easy as to fit, pedal off, MRP chain guide off, unbolt chainring, dont drop the ring nuts, re-use in new ring, the ring can be rotated and threaded over crank spider.....simple!
When refitting new ring you can get nuts in easily if hole is at 6 o'clock or use tape to hold them in.
Hardest part is the nut for the mrp chain guide, I used little finger to hold nut while remounting the chain guide.

Job done, ready to ride, even if it lasts half the life of Sram ring it'll be half the price.....a stainless ring would prob be ideal but at $165 I'll try this option first. View attachment 12118

Are you sure that the Sram chain ring is worn? Here is a pic of a brand new one I have, and other than paint worn off on yours the profile of the teeth look like they may be the same?

 

[Tony.OK]

Are you sure that the Sram chain ring is worn? Here is a pic of a brand new one I have, and other than paint worn off on yours the profile of the teeth look like they may be the same?

View attachment 12128

Ah well buggar me haha.....too many years of replacing motorbike ones! At least I got to tinker with bike then aye......?

 

[Mat_Ron]

Well at least you only bought the $25 one!

 

[steve_sordy]

When SRAM started the design of the Eagle series 12-speed they started from scratch. One of the key decisions was the chain ring tooth form. They ended up with one that looks worn out! They believe that along with detail design differences to the chain that they would get longer life and better power transmission.

My SRAM XX1 Eagle black chain has done almost 1500 miles (2400km) and it is only at 0.25% (I use a vernier calliper). Because I change at 0.6% - 0.65%, it is on target to do 3600 - 3900 miles. I will probably change the bike before I have to replace the chain.

The best indicator of tooth wear is the chain. If the chain has not "stretched" then the teeth will be OK, both on the ring and on the cassette. One wears the other.

 

[The Flying Dutchman]

While cleaning Trance the other day I was surprised how worn the front chainring was after about 800km, replacement in NZ is about $100nzd so thought I'd try a cheap alternative at $25, cant be much softer than Sram one.... View attachment 12117
Easy as to fit, pedal off, MRP chain guide off, unbolt chainring, dont drop the ring nuts, re-use in new ring, the ring can be rotated and threaded over crank spider.....simple!
When refitting new ring you can get nuts in easily if hole is at 6 o'clock or use tape to hold them in.
Hardest part is the nut for the mrp chain guide, I used little finger to hold nut while remounting the chain guide.

Job done, ready to ride, even if it lasts half the life of Sram ring it'll be half the price.....a stainless ring would prob be ideal but at $165 I'll try this option first. View attachment 12118

where did you get that ring from?

 

[Tony.OK]

where did you get that ring from?

I think from Aliexpress, 700+ kms wet n muddy and still sweet!