Hongfu FM079

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

The bike gained some more grams, I had to replace broken CF tension pulley from eBay with stock one. I've already glued CF pulleys once, maybe I'll try that again, but messing around with dirty drivetrain was too much for today. Another change was a new 50t Fibre-Lyte chainring, my previous one lost a tooth to a curb, which rendered 50/12 noisy and 50/11 straight unusable. No fun jamming/dropping a chain going down at max speed. The issue was fixed, now on 50/11 the chain only rubs FD slightly every several rotations, should be good enough. I did not get the opportunity to weight crankset parts before, so here you are. Those male chainring bolts are steel, so I ordered a set of aluminium KCNCs. The Zipp manual mentions that "you'll need 5mm and 6mm hex keys to work the bolts", but female ones clearly require a chainring bolt tool, I think those aren't stock. I wonder if the person I bought these from still visits WW.
Attachments
IMG_20180721_105800.jpg
Fibre-Lyte Zipp VumaQuad 50t chainring, lightweight 2
IMG_20180721_120926.jpg
Fibre-Lyte Zipp VumaQuad 34t chainring, lightweight 2
IMG_20180721_120809.jpg
Zipp VumaQuad chainring male bolts, steel
IMG_20180721_120649.jpg
Zipp VumaQuad all of chainring bolts and a spacer

by Weenie


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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

Back to a spare RD-5800 😂 Now I have an excuse to get an RD-R9100.
Attachments
IMG_20180722_144457.jpg
Last edited by Klaster1 on Sun Jul 22, 2018 11:54 am, edited 1 time in total.

Squashednuts
Posts: 326
Joined: Tue Apr 25, 2017 11:12 am
Location: Christchurch New Zealand

by Squashednuts

Klaster1 wrote:
Sun Jul 22, 2018 9:15 am
Back to a spare RD-5700 😂 Now I have an excuse to get an RD-R9100.
Looks nasty, what happened?

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

Squashednuts wrote:
Sun Jul 22, 2018 9:20 am
Looks nasty, what happened?
I think the guide jockey wheel unglued from bearing and moved to the left, I shifted down at crossroad and stopped, when I resumed movement the chain jammed between the jockey wheel and RD cage, then a loud pop and rear wheel stopped moving. Last ride the same happened, that's why I put the stock tension jockey wheel back. That was super stupid of me, I didn't think about what actually went wrong, I should have replaced both jockey wheels to stock. At least this happened 5 minutes into the ride, so I walked back home, grabbed my MTB and went for a ride. Whoever uses the same J&L wheels from a couple years ago, be careful. Carbonice pulleys look nice, any other suggestions?

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

Apparently, RD-5800 and RD-9000 cages have tension spring hole on opposite sides of axle, so I decided to play it safe and just put RD-9000 pulleys and inner cage plate on RD-5800. As I was afraid, the right dropout received some cosmetic damage. About 10 of chain links are bent to various degree, which makes it too short for any of my bikes and I don't have enough of master links yet to piece something more usable together from links left after the initial chain cut. I ordered a couple of new PYCs, a RD-R9100 SS and two sets of Carbonice pulleys while at it.
Attachments
IMG_20180728_161700.jpg
PYC SP1101, bent
IMG_20180728_161847.jpg
Dropout damage

TARE
Posts: 27
Joined: Thu Jan 29, 2015 10:27 am
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by TARE

And a crack on seatstay tube maybe?

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

TARE wrote:
Mon Jul 30, 2018 10:33 pm
And a crack on seatstay tube maybe?
Nah, that's electrical tape to guard against RD cable housing.

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

Turns out Carbonice pulleys aren't compatible with RD-R9100/RD-M9000 because of pulley bolt shape/thickness, despite claimed "can be used for all 9, 10 and 11 times cogsets". No lightweight pulleys for me until alu bolts from eBay arrive in several weeks. At least I dropped several grams from chainring bolts and RD housing (RD-R9100 needs less). I reused XEX-SL instead of heavier OT-RS900, the bend wasn't anything special given 12cm between chainstay housing exit port and hanger bolt.
Attachments
IMG_20180810_210900.jpg
Zipp (?) chainring bolts weight, 3pcs
IMG_20180810_205427.jpg
KCNC chainring bolts weight, 3pcs
IMG_20180810_203042.jpg
Shimano OT-RS900 weight, uncut, 24cm
IMG_20180810_203024.jpg
Jagwire XEX-SL weight, ~22cm
IMG_20180811_134300.jpg
New parts installed

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Klaster1
Posts: 300
Joined: Mon Aug 15, 2016 10:25 am
Location: Krasnoyarsk, Russia

by Klaster1

RD-R9100 shifts great and KCNC chainring bolts did not cause any issues yet.
Attachments
IMG_20180815_192644.jpg

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