longest reach brake?

[lincoln]

Hi,

I am trying a new fork on my Speedster conversion and need a bit more reach.  Maybe 7-8mm more.  I currently use the Tektro 559 - pretty much maxed out.  The Dia-Compe Mod 750 has been recommended as it specc'ed to reach 78mm vs. the Tektros's 73mm 

Has anyone hands on experience with both of these brakes?  I am hoping to here that "the Dia Compe is conservatively rated and easily has 7-8mm more reach than the Tektro".

Also if someone has another brake they have had favorable results with in trying to get all the reach they can I would love to hear about them.

Thank, Mick

[Ryan Watson]

I have some 80mm reach Tektro 800s and some 90mm reach Tektro 900s, which is the longest I've seen. 

The 900s are new, the 800s are basically new, but may have been used briefly. 

I'd take $30 for the 800 or $35 for the 900s. Or $20 if you just need a single front.

US postage included. 

Ryan in Albuquerque

Here's a pic (556 for comparison, 800, 900):

--
You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.
To post to this group, send email to 65...@googlegroups.com.
Visit this group at http://groups.google.com/group/650b.
For more options, visit https://groups.google.com/d/optout.

[Kieran Joyes]

The IRD B76 caliper might work. It's reach is a few mm longer than the Tektro R559, and about equivalent to the Dia Compe 750.

http://store.interlocracing.com/irdbcarobr.html

KJ

[Evan Baird]

Tried the B76 and it's a little short. The Dia Compe should work.

[Jim Bronson]

Wow that's amazing.  What is the range on the 800s and 900s?  I.e., the 556 is 55-73 IIRC.

[Ryan Watson]

From Cycle Yoshida website, they stock both:

72-92mm for the 900A

61-78 for 800A

On Sep 3, 2014, at 19:10, Jim Bronson <jim.b...@gmail.com> wrote:

Wow that's amazing.  What is the range on the 800s and 900s?  I.e., the 556 is 55-73 IIRC.

On Sep 3, 2014 3:19 PM, "Ryan Watson" <rswa...@me.com> wrote:

I have some 80mm reach Tektro 800s and some 90mm reach Tektro 900s, which is the longest I've seen. 

The 900s are new, the 800s are basically new, but may have been used briefly. 

I'd take $30 for the 800 or $35 for the 900s. Or $20 if you just need a single front.

US postage included. 

Ryan in Albuquerque

Here's a pic (556 for comparison, 800, 900):

[Brad]

Perhaps these take the cake.
http://sheldonbrown.com/harris/brake-calipers.html#74-95

[Nick Bull]

I had some of the Tektro 800's and I really liked them ... except for the lack of quick-release.  Why don't they put a dang QR on them?!?

The Dia-Compe 750's are just fine if they're a long-enough reach.  I was never able to get Mafac Raid's to work with acceptable braking force, at least not without going to the expense of installing braze-ons.

Nick

[Mark Bulgier]

I don't think this is really what you're looking for, but it might be the answer to the question of what's the longest-reach brake ever: the Weinmann 1020 sidepull from the '70s.  I think they reach to over 100 mm.

They were made to reach around balloon tires and fenders.  Very flexible, pretty bad brakes.  The stock pads are terrible but you may be alarmed at how much they'll flex if you actually put some good sticky pads on 'em! 

If you want a pair despite all that, they're cheap here: http://www.ebay.com/itm/360736450428  $40 for a pair of brakes (F+R), free shipping!

The eBay photo shows some little hardware pieces missing, but the description doesn't say anything about missing parts.  It just says "New", which is supposed to mean complete and ready to use.  At that price though, maybe you could afford to spend a little time searching for the missing pieces in the junk pile of some older bike shop.  The needed parts are pretty common, they came on the more-popular Weinmann 500 and 730 sidepulls too.

Mark Bulgier
Seattle

[Peter Adler]

Nuh uh. I've got a pair that's got 98-116mm reach: The Tektro C324 dual-pivot cruiser sidepull, intended for 38-50mm rims and 3" tires. They're heavy, they're huge and they have practically no mechanical advantage. But they've got reach, even more than BMX brakes like the Dia-Compe Bulldogs.

Retail is about $38. I picked up a pair ($5) at the Rivendell parking lot sale in June, where they had a carton of new sets for some aborted project that Grant seemed to shudder about when I asked him; he clearly didn't want to talk about it. I got them to cannibalize the nutted pivot bolts, to swap them onto the Silver sidepulls (AKA Tektro 559) that I'd bought (sans QRs) at another Riv sale a few years back. Those Silvers are going into a 650B conversion on a 1972 Raleigh SuperCourse, but I'm not sure those brakes are long enough to convert a 27" frame to 650B.

I'm really not confident that there's any sidepull that's got long enough reach to convert from 630 BCD to 584. The lever action in those long arms just doesn't put enough energy into the braking action to stop a wheel moving at speed. Dia-Compe 750 (or the equivalent Weinmann centerpull) may be the only realistic option, if you don't have mount posts.

Peter Adler

Berkeley, CA

[Ryan Watson]

I have successfully converted a 630 bike to 584 using the Dia Compe 750 centerpulls. The stopping power was excellent. Almost TOO good, I actually had to dial it back a bit! No doubt the Raids would be just as good. 

I got a pair of those 90mm Tektro 900s but haven't had a chance to use them yet. 

Ryan

--

You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.
To post to this group, send email to 65...@googlegroups.com.
Visit this group at http://groups.google.com/group/650b.
For more options, visit https://groups.google.com/d/optout.

<TektroC324.jpg>

[David J Hays]

I used a pair or Tektro 559s (aka Silvers) to successfully convert a Raleigh Marathon Mixte from 27" to 650B.

David Hays

Kenmore, New York

--
You received this message because you are subscribed to the Google Groups "650b" group.
To unsubscribe from this group and stop receiving emails from it, send an email to 650b+uns...@googlegroups.com.
To post to this group, send email to 65...@googlegroups.com.
Visit this group at http://groups.google.com/group/650b.
For more options, visit https://groups.google.com/d/optout.

<TektroC324.jpg>

[mitch....@gmail.com]

On Sunday, September 14, 2014 11:54:42 AM UTC-6, Ryan wrote:

I have successfully converted a 630 bike to 584 using the Dia Compe 750 centerpulls. The stopping power was excellent. Almost TOO good, I actually had to dial it back a bit! No doubt the Raids would be just as good. 

I got a pair of those 90mm Tektro 900s but haven't had a chance to use them yet. 

Were these the new production 750s or vintage? And if new, did you get this good stopping power with the stock grey pads or did you change pads?

thanks,

Mitch 

[Ryan Watson]

Mitch,

They were new-ish ones. Maybe 5 years ago? Mathauser "salmon" pads. 

--

[Matt R]

I'm guessing you already resolved your brake issue but I've got experience with the Tektro 800As.  They're not half bad if you don't mind nutted installation, lousy pads and no quick release.  My Soma San Marcos is out of spec on the rear brake bridge and when I put a 650b wheel back there my old Tektro 556s came up about 5 mm short.  So I used 700c wheels on the Soma even though I wanted to use my 650bs.  Finally I said to heck with it, ordered the 800As and moved the 650bs to the Soma San Marcos like I always wanted to do.  

The 800As have just enough reach and now I like the ride of the San Marcos even more.  The 800As stop well enough but they don't take modern brake cartridges.  You'll need to use old school threaded brake pads and the gray ones that come standard on the 800As are pretty bad.  I had a set of old pink Skyway Tuff BMX pads lying around that are pretty much identical to Kool Stop Continentals.  They seem to work fine, much better than the Tektro gray pads.

I'd be concerned that the 800As won't have enough reach for you though.  They provide about 78mm of reach, only five more mm than the Tektro 559s.  If you really need to go 7-8mm more, the 800As won't have enough reach.  I'm not sure the Dia Compe 750s will have any more reach either.  Ryan's Tektro 900 (never heard of them before) should work. Or any of the longer single pivot BMX sidepulls (Tektro 984, Dia Compe Bull Dog, Odyssey 1999) will work but they will be ugly and hard to center.  At least the Odyssey comes in Silver and I think the Bull Dog has a quick release.  Let us know what you used in the end and how it worked out.

On Wednesday, September 3, 2014 4:00:47 PM UTC-4, lincoln wrote: