Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Bike Brakes Upgrade Advice

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Bike Brakes Upgrade Advice

Old 08-04-20, 05:01 PM
  #1  
Matty71
Newbie
Thread Starter
 
Join Date: Aug 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Bike Brakes Upgrade Advice

I'm very new to cycling so I'm after some rookie advice. I've bought a road bike (Genesis Equilibrium 20 2018) which has Shimano 105 5800 gear set but fitted with Promax RC-482 rim brakes, which are terrible in the dry and dangerous in wet conditions. So in order to avoid a crash, I'm looking for advice on upgrade options.

Should I consider upgrading the calipers to Shimano 105's which I've found for around 35-40 per caliper, other caliper alternatives, or just look to change the pads for something that's more likely to stop the bike (Swisstop or Shimano or something else?).

If the best option is to just replace the calipers, are they front and back wheel specific. Some sites appear to specify but others don't.

Thanks in advance,
Matty

Last edited by Matty71; 08-04-20 at 05:16 PM.
Matty71 is offline  
Old 08-04-20, 05:18 PM
  #2  
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,055

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 25 Post(s)
Tagged: 0 Thread(s)
Quoted: 1332 Post(s)
Liked 821 Times in 574 Posts
The cheap and easy thing would be to put on some Kool Stop salmon pads and see how they do. I have found even Shimano OEM pads to be somewhat lacking. You should be able to just get inserts which fit those Promax holders. Wet rims will never stop as well as when they are dry.
dsbrantjr is offline  
Old 08-04-20, 05:37 PM
  #3  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 14,931

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2927 Post(s)
Liked 1,205 Times in 845 Posts
Take apart your current brakes and clean then lube the various pivots. Adjust their free movement as tight as possible. Get some better pads (KS are good options). Recable with care to square up the casing ends. Then see how they are. The cost to do this is mostly time as the pads and cables are transferable to the replacement calipers should that become your final choice. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 08-04-20, 05:46 PM
  #4  
u235
Senior Member
 
u235's Avatar
 
Join Date: Mar 2017
Posts: 1,185
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 435 Post(s)
Liked 128 Times in 82 Posts
Like other said, new pads maybe. Strange that they are that bad. I've used some crappy old rim brakes and random pads and still got some decent stopping power, even bikes sitting for a long time and pulled from piles (Assuming cables were in good shape) and I'm no light weight. Maybe the rim or pads are contaminated?
u235 is offline  
Old 08-04-20, 05:54 PM
  #5  
Trevtassie
Senior Member
 
Join Date: Jun 2015
Location: Down Under
Posts: 1,901

Bikes: A steel framed 26" off road tourer from a manufacturer who thinks they are cool. Giant Anthem. Trek 720 Multiroad pub bike. 10 kids bikes all under 20". Assorted waifs and unfinished projects.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 768 Post(s)
Liked 624 Times in 337 Posts
Decent brake pads, compressionless cables, no improvement, new brake calipers.
Trevtassie is offline  
Old 08-04-20, 09:00 PM
  #6  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,316 Times in 827 Posts
looked them up they're a dual pivot brake , agree .. fresh Kool Stop pads .. Shimano may offer desired prestige , but those are adequate

And, Note: the long reach 47- 60 so no Shimano 105 brake may fit reach too short,,
Promax RC-482 Mechanical Dual Pivot Front Caliper Brake 47-60mm Reach

fietsbob is offline  
Old 08-05-20, 01:53 AM
  #7  
Matty71
Newbie
Thread Starter
 
Join Date: Aug 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks very much all. New pads it is!

Cheers,
Matty
Matty71 is offline  
Old 08-05-20, 03:08 AM
  #8  
cpach
Senior Member
 
Join Date: Oct 2009
Location: Mt Shasta, CA, USA
Posts: 1,861

Bikes: Too many. Cannondale SuperSix, Trek Remedy 8, Trek Crossrip+ get the most ride time.

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 414 Post(s)
Liked 202 Times in 160 Posts
It's possible the power is poor also because more recent Shimano brakes use a revised cable pull ratio--the lever pulls more cable over its throw, so when used with Sram/Campagnolo and older Shimano calipers you end up with a really firm feel at the lever with poor power. Technically your 5800 is Shimano SLR-EV, but New Super SLR is pretty similar in cable pull ratio, so I'd recommend picking up a set of Shimano BR-R451 as they have the correct reach for your bike coupled with a New Super SLR brake cable ratio. Also come with decent quality pads, unlike the Promax.

Probably worth it to try new pads on the Promax first though--worst thing is you could end up getting the BR-R451 and have a spare set of nice pads.
cpach is offline  
Old 08-05-20, 03:40 AM
  #9  
dpd3672
Senior Member
 
Join Date: May 2015
Location: Detroit, MI
Posts: 56

Bikes: 02 Cervelo P2K, 07 Cervelo P2SL, 07 Cervelo Soloist, 09 Cervelo RS, 96 Quintana Roo Kilo, 80 Chicago Schwinn Letour, 12 Motobecane Nemesis, 97 Kona AA, 97 Cannondale f700

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Agree with the consensus. I've very rarely encountered bad brake calipers, and I've used everything from bottom of the line single pivot to Dura Ace/Super Record.

The lever can make a difference, if it's not designed for the caliper in question (different pull ratios, such as from DA 7800 to 7900), but 90% of the time a better pad will fix the problem...the other 10% is usually because something is set up incorrectly.

Kool Stops are a great bang for the buck. Swiss Stop might be slightly better, but at a significant increase in cost. The Kool Stop combo pads (salmon/black) are great for all kinds of conditions.
dpd3672 is offline  
Old 08-05-20, 01:12 PM
  #10  
Matty71
Newbie
Thread Starter
 
Join Date: Aug 2020
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks for the additional info and guidance. I've ordered new pads so I'll see if that does the trick before considering the other options. I'll let you know how I go.
Matty71 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.