Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Take Part in the May's Giveaway: Win the LIVALL PikaBoost 2 E-bike Conversion Kit


Coverting the Nexus hub to "roller"
#1
Hello from the bluegrass state.
I’m contemplating an upgrade to my Shimano Nexus 8sp hub (SG-8C31) but unsure if there are components/ shops for this.
The internal hub has a coaster brake which is irritating to anyone preferring another brake system or the ability to back pedal for crank position.
Can this hub be converted to “roller brake” (I’m guessing a roller brake is a disc or V brake set up, allowing for back peddling).
I didn’t want to attempt a “shade tree mechanic” operation and simply remove the brake arm.
Is this a lost cause?
Thanks……Tom
2011softcruise


“Striker, listen, and you listen close: flying a plane is no different than riding a bicycle, just a lot harder to put baseball cards in the spokes.”
Airplane (1980) – Rex Kramer (Robert Stack)

  Reply
#2
Here are some useful links for you to understand what is inside:

http://www.sheldonbrown.com/nexus8/
http://bike.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0024-downloadFile.html/17)%20Inter%208%20ohaul.pdf
http://www.shimano.com/publish/content/global_cycle/en/us/index/tech_support/tech_tips.download.-Par50lparsys-0019-downloadFile.html/12)%20Structure%20and%20Function%203%20Speed.pdf
http://www.sheldonbrown.com/nexus-mech.html

Just disconnecting the brake arm is not going to disconnect the coaster brake, and will cause problems.

I would suggest switching to rim brakes, instead of trying to install the Rollerbrake®. The Rollerbrake® is kinda like a drum brake.
Nigel
  Reply
#3
Thanks Nigel, I'll see whats involved. I didn't understand the term "roller" and should have mentioned my interest in a disc brake set up instead.

The simpliest decision would be to sell my current 8 speed hub and invest in a hub thats already set up for a disc brake.

My current hub works fine so I have to decide whether to tolerate its function or put up the big bucks for what I want.

If there were parts to add to my hub and create the disc brake function then I would consider it but the SG-8C31 is engineered as-is.

Tom
2011softcruise


“Striker, listen, and you listen close: flying a plane is no different than riding a bicycle, just a lot harder to put baseball cards in the spokes.”
Airplane (1980) – Rex Kramer (Robert Stack)

  Reply
#4
Hi Tom;

http://bike.shimano.com/publish/content/global_cycle/en/us/index/products/0/alfine/product.-code-SG-S500.-type-.html

Or maybe a whole bike ready to go:
http://www.swobo.com/catalog/product_info_b.php?cPath=2448_2455
Nigel
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
4,522
10-14-2019, 06:55 AM
Last Post: walter
 
30,571
10-10-2012, 05:50 PM
Last Post: SPANNER
 
7,551
06-29-2012, 12:25 AM
Last Post: AL_BUNDY
 
10,868
12-13-2011, 04:47 AM
Last Post: mr-asje
 
10,739
07-26-2011, 05:23 PM
Last Post: DaveM
 
13,556
05-17-2011, 05:33 PM
Last Post: hcjg1

Forum Jump:

[-]
10 Latest Posts
New Member
Today 03:46 AM
How to stay safe while biking?
Today 03:44 AM
Safest bike helmets
Today 03:42 AM
Biking with helmet laws
Today 03:38 AM
Exploring the Hills with My Birch Hunter...
Today 12:48 AM
Doctors are Prescribing Cycling
Today 12:25 AM
Wearable Fitness Trackers
Yesterday 06:08 AM
Columbia 3 wheel differential
Yesterday 12:27 AM
Great Trail Ride - NW Lancaster, Pa
05-14-2025 05:26 PM
Pre Ride Food Intake
05-13-2025 11:12 PM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Flowrider
21 posts
no avatar 2. Painkiller
20 posts
no avatar 3. GirishH
16 posts
no avatar 4. enkei
12 posts
no avatar 5. SPINMAN
12 posts