wroomwroomoops

Oh. OK.

For the record, in SSFG and/or in the Bike Mechanics subforum, there were accounts of people who have folded their chainring, with their pedaling. So your case isn't really unique in that sense. Here is one such thread: https://www.bikeforums.net/showthread...ring-diagnosis

m0nkiwitacaus

thanks for that, a few of those comments were pretty helpful

..still deciding on what kind of chainring to buy tho =/

i liked this one a lot:
https://www.ebikestop.com/all_city_46...ngs-CR2946.php
it's made of "7000 series aluminum"

any comments on it anyone?

iiAtlas

I know it's a bit above your price range but right now im riding on a Sugino 75 crank and i LOVE it.


I highly recommend this to anyone willing to drop $200 on a crank

TejanoTrackie 

More like $300+ including a chainring and bolts. But yes, awesome cranks.

iiAtlas

Ya I got a deal at the shop
Haven't had a single let down with these bad boys!

ianjk

I have to agree with this. I have a chainring hanging on my wall that is the OP's chainring's long lost cousin. Lost a bolt, went to take off and she folded over instantly.

wroomwroomoops

You're welcome. I remember that thread well, as it was quite interesting to see this bent chainring so often.

As for 7000 series aluminum, there are various alloys in that series, and the same alloy can come in various tempers. Still, pretty much any 7000 alloy will be harder than a 6061, for instance. Cranks are usually made of 6061, and the cheaper and crappier chainrings as well. Point in case: Rocket Rings. Keep clear of that abomination as far as you can.

Nowadays the best chainrings are made of 7075 aluminum alloy. From personal experience I can say that a 7075 chainring will last many times longer than one made of 6061. Steel would be the best material for a chainring, but nowadays only Surly makes steel chainrings. Those will last a lifetime.

Here is an excellent crankset that comes with a 7075 chainring, for example:
https://www.universalcycles.com/shopp...s.php?id=21765

I would discourage you from getting the Sugino 75 (Sugino does have good products, but..) because it's the same crankset you can buy for half the price from other, less renowned manufacturers: just two pieces of forged 6061 aluminum. Absolutely nothing to justify the pricetag. Of course, it gives you street cred among a certain demographic, if that's your thing...

TejanoTrackie 

While we're on the topic of inexpensive quality cranksets, anyone wish to provide an opinion on the Vuelta cranks >>> https://www.universalcycles.com/shopp...6&category=688

wroomwroomoops

Add me to the list of those who would like to hear first-hand accounts. On paper, it looks like an unbeatable deal (for a 144 BCD crankset with a 7075 chainring).

m0nkiwitacaus

well, i only need a chainring right now, it looks like the spider is fine so i don't think i need to replace the whole crankset.

i just found these two which are both made of 7075:
https://www.universalcycles.com/shopp...29&category=50
https://www.universalcycles.com/shopp...07&category=50

i don't know if theres much of a difference between a track specialized chainring and one that's just for ss/fg, except maybe aerodynamics...but how do those two look?

I would prefer to get the cheaper one (the first one), but do you guys think it's of good quality?

TejanoTrackie 

The first chainring (Specialized) is 3/32 thick, whereas the second (FSA) is 1/8 thick, so it will be stiffer and stronger. Also the FSA is solid, so that also makes it stiffer and stronger. So, I would recommend the FSA.

m0nkiwitacaus

nevermind..didn't realize that the FSA is for 144 bcd. I'll try to keep looking for one that's 130

wroomwroomoops

This is what I would suggest:
https://www.universalcycles.com/shopp...s.php?id=19750
Even though it's not 1/8", it will outlive any aluminum (even 7075) chainring by a looooooong long time. It might outlive even you, although I do wish you a very long life.

Otherwise, if it really has to be aluminum, you might consider these:
https://cgi.ebay.com/ws/eBayISAPI.dll...2#ht_500wt_750

NateRod

can't talk about vuelta cranks but I got the SRAM S300 about a month ago and it's also a decent inexpensive solution. Kind of like the poor man's Omnium.

The GXP BB is a little noisy however. Nothing too crazy though. I usually don't even notice it.

m0nkiwitacaus

Are there any cons of using a steel chainring? And would the Surly chainring you suggested be ok to use with ss/fg?

wroomwroomoops

1. None.
2. It would - it has no ramps or pins.

m0nkiwitacaus

Also, would there be much of a difference by switching my chain from a 1/8 to a 3/32 when using this?

wroomwroomoops

You don't need to get a 3/32" chain, but if you want, and if your cog or freewheel are also 3/32", you can. There should be no difference.

m0nkiwitacaus

ohh ok. I thought i had to switch the chain out to accommodate this. Thanks for all your help, and everyone else who also provided their input!

Leukybear 

He'll need a new BB too.... hilarious how just a entire 75 setup would cost more then his entire bike....
Great cranks, if not the best in my opinion but his motobecane is in no way worthy of these bad boys.

m0nkiwitacaus

one more thing, would it matter if my chainring is 3/32 and my rear sprocket is 1/8?

TejanoTrackie 

No...provided you use a 1/8 chain.