Retrobike Forum Index

It is currently Sat Feb 27, 2021 10:50 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Brake boosters?
PostPosted: Tue Jan 19, 2021 3:50 am 
Dirt Disciple

Joined: Tue Dec 15, 2020 11:53 pm
Posts: 18
Hi
I am in the process of building up a titanium frame(Litespeed), and it’s going to get V-brakes. This will be my first experience with them as I went from cantilever to disc on other bikes. I’ve read some conflicting reports on the efficacy of brake boosters, so I was hoping for this community to weigh in. I get very good input here. I’m also wondering if a bike is better served to have a brake booster on the front or the rear(if at all).
Cheers


Top
 Profile  
 
 Post subject: Re: Brake boosters?
PostPosted: Tue Jan 19, 2021 9:00 am 
Retro Guru
User avatar

Joined: Sun Mar 13, 2011 11:53 pm
Posts: 388
Location: Jersey C.I
I personally never really used them and got on just fine without.

There is definitely a case for them on frames that have a great amount of twist flex in the seat stays or forks as the force of the brake action will twist these both outward.

For me it really goes down to personal choice, I don’t like the look.

I’d say try out a cheap one, something like tectro, then if you like what it adds (there may be no noticeable difference) get yourself a nice fancy one.


Top
 Profile  
 
 Post subject: Re: Brake boosters?
PostPosted: Tue Jan 19, 2021 10:29 am 
Old School GrandMaster | Rider
Old School GrandMaster | Rider
User avatar

Joined: Thu Nov 26, 2015 7:29 pm
Posts: 7844
Location: peak district
Hi

V-brakes are very powerful, if the stays have any flex, steel frames for example, then the power of the brake arms will transfer to the stays and they will flex outwards losing some of the clamping power onto the rim. Therefore a booster on the back is a good idea (stops the stays moving) if you are running them on a steel frame. As for other materials, it is a case of trying the brake and seeing if they flex, aluminum should be fine. Ti, i have had flexy and stiff Ti frames so would be frame dependent.

As for forks, the same applies, if rigid and steel, again, the legs will flex with the power of the brake and you will lose some of that power.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Tue Jan 19, 2021 10:40 am 
retrobike rider
retrobike rider
User avatar

Joined: Fri Aug 08, 2008 2:36 pm
Posts: 19079
Location: Yorkshire, England
Boosters work well on early suspension forks.
Not only as a slight extra brace, but to stop the lower rotating outwards from the pivots.

Rear, even on flexy frame I wouldn't bother to much, you'll still have good modulating brakes if you set them (and Canti) up properly.
Canti's can easily make them flex just as much. There's no difference.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Tue Jan 19, 2021 10:51 am 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Thu May 06, 2010 10:05 pm
Posts: 10247
Location: Scotland
I'd just fit the V-brakes and ride, get a feel for the brakes, and if you think you need a booster, or can feel or see the fork/stays flexing then invest in a booster, they're very simple and easy to retro-fit.
Odyssey U4 Titanium are nice.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Tue Jan 19, 2021 12:26 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Mar 13, 2009 7:19 pm
Posts: 3547
Location: Leeds, for ages!
V-brakes are very powerful, if the stays have any flex, steel frames for example, then the power of the brake arms will transfer to the stays and they will flex outwards losing some of the clamping power onto the rim. 

That's the science that sold them in the first place. ^^

However I've enjoyed no noticeable effects, despite the frame or brake type.

I suppose the block push will counter with the frame, but the pads get sucked
in and, rotated counter clockwise equally, clockwise also by the rim.

Would that help counter any frame flex?, I dunno nor care. Just ride.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Tue Jan 19, 2021 1:35 pm 
Gold Trader
Gold Trader
User avatar

Joined: Fri Jan 23, 2009 2:30 pm
Posts: 17222
Location: Surrey
Ive had a few frames where you can see the flex/stays push out under braking. If you like the feel of the brakes, don't worry about the booster, but if you want more power and less flex then go for one. I have a few nice ti boosters on my ti frames, shimano m950 carbon are nice too but make setting up brakes awkward as you really need to set them up, then fit the booster.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: heymarge, Max P, sam_white, vincenth and 83 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2021 Retrobike unless otherwise stated.
Cookies Policy.
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group