SkyPivot——A superlight carbon crankset from China

Discuss light weight issues concerning road bikes & parts.

Moderator: robbosmans

Rudi
Posts: 239
Joined: Tue Apr 08, 2014 6:43 pm

by Rudi

philipeleven wrote:
Tue Oct 29, 2019 4:03 pm

So I just gave up making superlight chainring for 4 bolt spider now. anyone needs shave down weight could just go for 5 bolt spider(39g), with extralite chainrings.
I'm also interested in these but I thought you'd said you weren't going to do 5 bolt. Is this just for the PM version?
Cervelo R3 - 5.4kg viewtopic.php?f=10&t=142420

by Weenie


philipeleven
Posts: 74
Joined: Mon Sep 23, 2019 2:01 pm

by philipeleven

Beaver wrote:
Tue Nov 05, 2019 11:37 pm
Looks very interesting. What would be the weight for a 172,5mm/BB386/110BCD 5-bolt spider set? And what ISO and EN testing will you do?

Letting having it checked here (or another indepedant facilitly) would be great and help build trust in the product: https://www.efbe.de/
about 320-325 grams.

passed ISO4210 drivechain fatigue test (race bike standard)

philipeleven
Posts: 74
Joined: Mon Sep 23, 2019 2:01 pm

by philipeleven

Rudi wrote:
Wed Nov 06, 2019 10:21 am
philipeleven wrote:
Tue Oct 29, 2019 4:03 pm

So I just gave up making superlight chainring for 4 bolt spider now. anyone needs shave down weight could just go for 5 bolt spider(39g), with extralite chainrings.
I'm also interested in these but I thought you'd said you weren't going to do 5 bolt. Is this just for the PM version?
It's because there are no superlight chainrings like the Extralite chainrings but with 4 bolt. So for those who want a extreme lightweight build, they can choose to use 5 bolt spider (partly because I want to use Extralite chainring too...) . but 5 bolt PM will be much heavier than 4 bolt PM (because 5 bolt PM needs a extra strong outerring to minimize chainring influence), so there will be only 4 bolt PM option.

Rudi
Posts: 239
Joined: Tue Apr 08, 2014 6:43 pm

by Rudi

Thanks for the clarification. 5 bolt non PM would be what I'm after in 170mm BB386.

I know you said December for an on sale date. Any update on that?
Cervelo R3 - 5.4kg viewtopic.php?f=10&t=142420

philipeleven
Posts: 74
Joined: Mon Sep 23, 2019 2:01 pm

by philipeleven

Rudi wrote:
Wed Nov 06, 2019 7:37 pm
Thanks for the clarification. 5 bolt non PM would be what I'm after in 170mm BB386.

I know you said December for an on sale date. Any update on that?
yield rate is quite low now. on sale at the end of this month in China, but won't be enough product until yield rate improved.

and still needs a website to sell outside China.... :)

Francois_Viviers
Posts: 198
Joined: Sat Oct 25, 2003 7:12 pm

by Francois_Viviers

Any new updates?

g32ecs
Posts: 707
Joined: Thu Apr 11, 2013 2:50 am

by g32ecs

Admittedly Im too lazy to skim through the pages, but is there a SRAM Red AXS version?

Thanks

honeybunner
Posts: 11
Joined: Thu Oct 10, 2019 7:55 pm

by honeybunner

g32ecs wrote:
Tue Nov 19, 2019 4:21 pm
Admittedly Im too lazy to skim through the pages, but is there a SRAM Red AXS version?

Thanks
The only things that need to be changed on a crankset for SRAM Red AXS compatibility are the width of the teeth on the chainring(s) and the gear combos, both of which don't necessitate new chainring mounting standards.

User avatar
Klaster_1
Posts: 1055
Joined: Mon Aug 15, 2016 10:25 am
Location: Russia, Saint Petersburg

by Klaster_1

Anyone got the crankset yet? @cajer can you share you experience?

Rudi
Posts: 239
Joined: Tue Apr 08, 2014 6:43 pm

by Rudi

philipeleven wrote:
Thu Nov 07, 2019 12:12 pm
and still needs a website to sell outside China.... :)
I was assuming no based on the above
Cervelo R3 - 5.4kg viewtopic.php?f=10&t=142420

checky
Posts: 368
Joined: Mon Nov 15, 2004 12:52 pm
Location: in rocks and roots

by checky

will a 104mm bcd MTB version be available (w/o PM)?

Francois_Viviers
Posts: 198
Joined: Sat Oct 25, 2003 7:12 pm

by Francois_Viviers

These are available for pre order on Taobao today. Not sure how to order these as I cannot enter an address etc. Google translate only gets me so far.

https://item.taobao.com/item.htm?id=610298440160

alanyu
Posts: 637
Joined: Thu Jun 06, 2019 1:10 pm

by alanyu

Francois_Viviers wrote:
Tue Dec 31, 2019 1:48 pm
These are available for pre order on Taobao today. Not sure how to order these as I cannot enter an address etc. Google translate only gets me so far.

https://item.taobao.com/item.htm?id=610298440160
Yes, it's pre-order on taobao, but you need to wait until late March for them starting delivery......

CLEAR
Posts: 222
Joined: Tue Jul 24, 2012 2:20 pm

by CLEAR

alanyu wrote:
Tue Dec 31, 2019 2:47 pm
Francois_Viviers wrote:
Tue Dec 31, 2019 1:48 pm
These are available for pre order on Taobao today. Not sure how to order these as I cannot enter an address etc. Google translate only gets me so far.

https://item.taobao.com/item.htm?id=610298440160
Yes, it's pre-order on taobao, but you need to wait until late March for delivery......
If I pre-order now, can I request for all carbon no logo, for march delivery?

by Weenie


alanyu
Posts: 637
Joined: Thu Jun 06, 2019 1:10 pm

by alanyu

CLEAR wrote:
Tue Dec 31, 2019 2:52 pm
alanyu wrote:
Tue Dec 31, 2019 2:47 pm
Francois_Viviers wrote:
Tue Dec 31, 2019 1:48 pm
These are available for pre order on Taobao today. Not sure how to order these as I cannot enter an address etc. Google translate only gets me so far.

https://item.taobao.com/item.htm?id=610298440160
Yes, it's pre-order on taobao, but you need to wait until late March for delivery......
If I pre-order now, can I request for all carbon no logo, for march delivery?
Not sure, you need to ask them... AFAIK, they only have produced one crankset in matt as a test.

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