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Ari Prolongs XX1 Cassette Life With Repacement Cogs & Lower Gears

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Ari-XX1-Large-Cog-Replacement

A small producer from Italy, Ari has produced a cog that will replace the large aluminum cog on XX1 and X01 cassettes. This is the only cog that is made of aluminum on these cassettes, so in theory could be prone to wear out much faster than the rest of the hardened steel cogs. SRAM does not sell this cog as a replacement, so Ari claims to be the only one in the world offering these right now.

More interesting though is that the replacement cog is also available in a 44t size. The stock XX1 cassette is a 10-42 spread, so in addition to a simple replacement in 42t size, they also offer a 44t for those people that really need to get up that steep hill. The larger replacement weighs 94 grams, or 12 grams more than a stock SRAM cog, and the replacement 42t from Ari weighs 82 grams, the exact same as the SRAM. Made from Ergal 7075 T6, they are available now for €75 plus express shipping to the USA.

Ari-44t-XX1-Cog

 AriBike.it

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Dave
Dave
9 years ago

Uh, don’t you mean a *lower* gear?

Heffe
Heffe
9 years ago

Like their larger cogs for a 10 speed setup this looks very cool, but again – there is no way to actually order from this link. Anyone else find a ‘place order’ button?

Lars
Lars
9 years ago

I don’t see a way to order these on the website.

ayyggss
ayyggss
9 years ago

if you need a lower gear than a 42t maybe you should stick to 2x .

Heffe
Heffe
9 years ago

I did a search a while back looking for a way to order their 38 tooth or 40 tooth cog, I can’t remember the details right now. I could not find any place on the net, in any language, to order their products.

gringo
gringo
9 years ago

I wonder how Mr. Day feels about this use of his logo.

Andrew Fleming
Andrew Fleming
9 years ago

Wow – a 30T ring matched to a 44T low on the cassette is equivalent to an old fashion 22T granny ring on the old low of 32T on the cassette. Can’t really complain that x1 doesn’t go low enough anymore.

Canon Dale
Canon Dale
9 years ago

@ gringo

I bet you they won’t be easy to get/find in the USA.

chukko
chukko
9 years ago

@ayyggss – i strongly disagree. Although the 1x might have been introduced/designed for racers, nowadays you can easily use 26t narrow wide rings (and i even found a guy producing 22t) – so if you give up on the low side of the range, you can happily ride 1x 22×44 on the high end.

DM
DM
9 years ago

Isn’t it the small cogs that wear quicker?

wunnspeed
9 years ago

Here is the order page… http://www.aribike.it/Moduli/order.htm It’s under the Contatti – Aquistti tab. Hope that helps.

Clarence
Clarence
9 years ago

DM’s got a point. Campagnolo (Shimano recently as well, I think) makes the bigger cogs of their top end Cassetes in less-harder titanium for weight savings and keep the smallest ones in Nickel coated steel for a reason. Not quite sure but, as well depending on the ratio, there’s a point when an 11T starts lacking efficiency when pedaling, does this happen with the 10T of the XD drive cassete? Even if one has a 34/36T installed on the front?

Collin S
9 years ago

@clarence,

I kind of wonder the same thing. On a single speed, semi/equivalent gears that utilize a smaller rear cog (IE 32×16 vs a 36×18), seem like there is more drag in the drive train. Other people have said the same thing. Gerry Phlug (SS monster) says he always tries to run a much bigger/more tooth count setup for NUE races for this very reason. Maybe with a derailleur, its taking some of that tightness out of the equation since the chain isn’t rapping all the way around the cog like in SS setups?

Brendan
Brendan
9 years ago

Clarence & Collin, you’re right. Chet Kyle did a lot of tests in the 80s for the US Olympic cycling team and found that there’s a steep dropoff in efficiency with cogs smaller than 16t. that 10t is for sure going to have more drag than larger cogs.

But weight and size are easy metrics for a consumer to understand, efficiency is not. Imagine increasing the size of each cog and the chainring on a 1×11 system by 20%. The 10-42 becomes 12-50. Now your lowest cog is as big as a road bike’s big ring, and the cassette’s weight might go up ~40% (if the diameter of a disc increases 20% its area increases 44%). The derailleur has to get bigger, you need more chain links, etc. Much harder to sell.

Jeff
Jeff
9 years ago

I just received a 42t replacement cog from ARI. I did not use the website. I emailed them and they gave me an address tha I could send payment to via paypal…no problem. There was good communication from them as well. It came very fast when shipped. Slight delay in getting it in the mail. It took a little effort to fit the cog on the xd1 driver. However it seems to work great once I got it on. I feel like I have a brand new cassette. One thing to note: I had trouble with the spacer. I somehow damaged one of the spacers during install so I tried to install without the spacer. This seemed OK but the the free hub was not as free. Luckily the spacer is identicle in dimensions to a bottom bracket spacer( have to find the correct thickness though). Once I reinstalled with correct spacing everything works fine. I am stoked that I don’t have to spend a few hundred on a new cassette.

Ron Ocampo
8 years ago

How much was the replacement?

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