SZZS CEF50 lightweight using Bafang M820 motor (Specifications Thread)

[lkdoido]

good morning, a question regarding the chainring: it does come standrd with a 32T, but can I find different size aftermarket? Is it steel? Do we need any special proprietary tool to remove it?

I assembled it with 34T, but I've never disassembled it so I don't know if I'll need any special tools to remove it. I think 32T would be bad for maintaining faster shifting speeds.

 

[mike_kelly]

Bafang chainrings are not easy to find and they are heavy steel. I bought an adapter to convert to 104bcd to have a better selection. Yes you need a special tool to remove the DM chainring.

https://www.aliexpress.us/item/3256805980118145.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=19235666539&albag=&trgt=&crea=en3256805980118145&netw=x&device=c&albpg=&albpd=en3256805980118145&gad_source=1&gclid=EAIaIQobChMI2ebRkaXRhQMVfjjUAR1MRAYMEAQYCCABEgJmKfD_BwE&gclsrc=aw.ds&aff_fcid=7634b36c921346259719310c2c6605e6-1713633219648-03099-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=7634b36c921346259719310c2c6605e6-1713633219648-03099-UneMJZVf&terminal_id=b08963a348424245bb3ae0763824ad4d&afSmartRedirect=y&gatewayAdapt=glo2usa

 

[TCFlowClyde]

good morning, a question regarding the chainring: it does come standrd with a 32T, but can I find different size aftermarket? Is it steel? Do we need any special proprietary tool to remove it?

I use a 104BCD 32T aluminum aftermarket no prob. Raceface is a common choice. Don't need steel on a 1x12 drivetrain, very little wear and 2-3x heavier.

Should be able to run a 30-36 T range on 104BCD depending on needs.

The only thing about compatibly is the Bafang spider (like Mike's link above) and the ISIS interface/spindle.

Fortunately that's why we have a wide range of cranks to use (ISIS compatible).

 

[BenCatalan]

I use a 104BCD 32T aluminum aftermarket no prob. Raceface is a common choice. Don't need steel on a 1x12 drivetrain, very little wear and 2-3x heavier.

Should be able to run a 30-36 T range on 104BCD depending on needs.

The only thing about compatibly is the Bafang spider (like Mike's link above) and the ISIS interface/spindle.

Fortunately that's why we have a wide range of cranks to use (ISIS compatible).

Thanks for the clarification, it helps.
But you’re correct, crank ‘s length will do the trick (ordered some 155mm from Miranda).

 

[BenCatalan]

I assembled it with 34T, but I've never disassembled it so I don't know if I'll need any special tools to remove it. I think 32T would be bad for maintaining faster shifting speeds.

View attachment 155917

Well, I was thinking of a 30T as it’s pretty steep where I live (and any bike I’ve tried in 29er that uses 32 or bigger always felt off) and the bike will likely never see the asphalt to reach those speeds

 

[BenCatalan]

Bafang chainrings are not easy to find and they are heavy steel. I bought an adapter to convert to 104bcd to have a better selection. Yes you need a special tool to remove the DM chainring.

https://www.aliexpress.us/item/3256805980118145.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=19235666539&albag=&trgt=&crea=en3256805980118145&netw=x&device=c&albpg=&albpd=en3256805980118145&gad_source=1&gclid=EAIaIQobChMI2ebRkaXRhQMVfjjUAR1MRAYMEAQYCCABEgJmKfD_BwE&gclsrc=aw.ds&aff_fcid=7634b36c921346259719310c2c6605e6-1713633219648-03099-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=7634b36c921346259719310c2c6605e6-1713633219648-03099-UneMJZVf&terminal_id=b08963a348424245bb3ae0763824ad4d&afSmartRedirect=y&gatewayAdapt=glo2usa

Thanks for this, but I cannot see the link for the tool you’ve mentioned. I’d like to get everything sorted before receiving the engine as I have a customer waiting too.