Results 1 to 6 of 6
  1. #1
    mtbr member
    Reputation:
    Join Date
    Apr 2012
    Posts
    134

    NEXUS 7 Speed Roller Brake

    I picked up a sweet KHS Fleetwood about 15 years ago. 7005 AL frame debadged, Chris King head set, Zack 19 rims & Specialized Son of a strong arm cranks. It's my cafe, 6 pack cruiser. The 7 speed Nexus hub (SG-7R40) is awesome around town. The problem is the POS IM41 roller brake, it is worthless. All the stopping comes from the unique front v-brake.

    Can I simply switch out the current roller brake for a newer model?

    Shimano Rollerbrakes -- Design, Applications, Installation, Maintenance

    I can get a IM80 for around $40

    Amazon.com : Shimano Nexave BR-IM80 Rear Roller Brake : Bike Hubs : Sports & Outdoors
    Attached Thumbnails Attached Thumbnails NEXUS 7 Speed Roller Brake-khs-1.jpg  

    NEXUS 7 Speed Roller Brake-khs-2.jpg  

    NEXUS 7 Speed Roller Brake-khs-3.jpg  

    2012 Specialized Camber Comp 29er
    Trek 9800 OLCV, XT upgrade 26er
    KHS Fleetwood
    Schwinn 20" Fastback 5 speed stick shift

  2. #2
    Frt Range, CO
    Reputation: pursuiter's Avatar
    Join Date
    May 2008
    Posts
    2,405
    Did you ever lube the brake with Shimano roller brake lube? Yes, you can replace it but I'd try lubing your existing brake. They never work that well in the first place, esp if the brake cable has full housing.

  3. #3
    Music & Bikes
    Reputation: fokof's Avatar
    Join Date
    Apr 2006
    Posts
    925
    Yes the newer IM80 is better but it will never be as efficient as your front V-Brake.
    "There is a big difference between kneeling down and bending over" -FZ

  4. #4
    mtbr member
    Reputation:
    Join Date
    Apr 2012
    Posts
    134
    Figured after 14 years with no maintenance I figure the current brake is shot.
    2012 Specialized Camber Comp 29er
    Trek 9800 OLCV, XT upgrade 26er
    KHS Fleetwood
    Schwinn 20" Fastback 5 speed stick shift

  5. #5
    mtbr member
    Reputation: Dan Burkhart's Avatar
    Join Date
    Mar 2014
    Posts
    18
    The IM41 is not a bad brake, and it should last pretty much forever. it won't stop you like the larger versions will, but I sold a lot of these, and had them on the rear wheels of most of my rental fleet and had no issues.
    one thing I found was that proper setup is everything. You want absolutely minimum free play before the brake starts to drag. Also, contrary to all published data, I found they worked better with long travel, AKA linear brake levers.

  6. #6
    mtbr member
    Reputation:
    Join Date
    Apr 2012
    Posts
    134
    I successfully installed the bigger IM-80 roller brake. 1 read the instructions, 2 I apologized for telling my wife to get the f out of the garage. It took me forever to get the cable pull installed on the brake until I read the instructions. The new brake does work better. Only issue I have is one leftover part. It's a bushing type spacer. What's is it for? Everything works fine without it.
    Attached Thumbnails Attached Thumbnails NEXUS 7 Speed Roller Brake-image.jpg  

    2012 Specialized Camber Comp 29er
    Trek 9800 OLCV, XT upgrade 26er
    KHS Fleetwood
    Schwinn 20" Fastback 5 speed stick shift

Similar Threads

  1. alfine 11 speed w/ roller brake
    By pintwister in forum Internal Gear Hubs
    Replies: 3
    Last Post: 08-27-2012, 07:57 AM
  2. Help with IGH Nexus 7 speed (SG-7R40)
    By David C in forum Internal Gear Hubs
    Replies: 23
    Last Post: 06-21-2012, 08:45 PM
  3. Nexus 3 speed hub review
    By Wrath of Kyle in forum Internal Gear Hubs
    Replies: 11
    Last Post: 09-01-2011, 06:55 AM
  4. Nexus 3 speed hub question
    By Wrath of Kyle in forum Internal Gear Hubs
    Replies: 5
    Last Post: 07-26-2011, 02:26 PM
  5. Nexus 4 speed
    By jjsinglespeed in forum Internal Gear Hubs
    Replies: 1
    Last Post: 01-03-2011, 07:26 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •