Very exposed chainrings on Avinox bikes - what happens when you hit a a log?

billium · Friday at 8:50 PM

I am looking at Avinox on my next bike but pretty much none of them have a bashguard low enough to protect the chainring as my old Bosch equipped Whyte E160 does.. These motors are so small that there is no material low enough to protect the chainring.
So, if I buy one, I know that I will quickly have to decide whether to roll over a big log or get off and walk it......

Obviously, hitting a rock would likely cause damage but what about a fallen tree on the Bridlepath - say 30cm ?
Would bouncing over that cause real damage to motor or chainring or will it just shrug it off with 70 Kg rider.

Suns_PSD · Friday at 9:23 PM

E13 sells an Avinox bash ring. Cost about $150 US, weighs about 250 grams & isn't terribly pretty. But for, it would be a requirement as well.

MetroNeck · Saturday at 3:16 AM

This has also been my concern.

I have had a few high speed hits on rocks, that surprisingly did not do any real damage. I wouldn’t worry about any logs on Bridle

Decided that the day I damage the ring, I will replace the entire thing with the E-Thirteen set-up.

Brawwp · Saturday at 3:30 AM

Just send it bro. It’ll be fine

ArmyOfEvilRobots · Saturday at 6:50 AM

I’d rather smash the ring on a rock than the motor housing tbh.
I’d prefer a decent skid guard to both though.

Astro66 · Saturday at 8:03 AM

Made my own. Works perfect.

billium · Saturday at 10:51 AM

Astro66 said:
Made my own. Works perfect.

View attachment 186027
View attachment 186028

I like it!
Right idea, have the frame take the shock not the chainring ( or its protector). Hopefully someone will design a taller bolt-in plastic replacement for the motor cover which could even have room for an inner tube & C02 setup. Such a setup could reduce motor cooling & might overheat in the desert but would still work just fine in the UK.

Konanige · Saturday at 4:38 PM

Sounds more like a skills issue! You shouldn't be relying on any part of a bike other than your tyres to get you over anything . You wouldn't do it on a clockwork bike where the chainring is even more exposed!

billium · Saturday at 5:43 PM

Konanige said:
Sounds more like a skills issue! You shouldn't be relying on any part of a bike other than your tyres to get you over anything . You wouldn't do it on a clockwork bike where the chainring is even more exposed!

Valid point but analog bikes are lighter and any damage would be way cheaper.
Also having a 'real' bashguard means that any rider can tackle bigger obstacles without damage - that's why it is there!

G-Sport · Sunday at 2:46 PM

Konanige said:
Sounds more like a skills issue! You shouldn't be relying on any part of a bike other than your tyres to get you over anything . You wouldn't do it on a clockwork bike where the chainring is even more exposed!

I would, but push bikes do have ISCG mounts and a range of little bash guards to fit them.

On my Levo SL I have a bashring on the crank and have covered the factory bashguard with carbon/kevlar (because the stock guards only last about a month on their own.

Very exposed chainrings on Avinox bikes - what happens when you hit a a log?

billium

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