Retrobike Forum Index

It is currently Sat Jul 04, 2020 1:35 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 73 posts ]  Go to page Previous  1 ... 4, 5, 6, 7, 8  Next
Author Message
PostPosted: Mon Dec 09, 2019 10:26 am 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 10032
Location: New Forest, UK
fearfactoryüberalles wrote:
hamster wrote:

I'm puzzled about what you say: the Kooka BB I have uses stock industrial bearings, available from any bearing factor for around £5. Likewise the Shimano UN91 can be repaired in the same way. UN72s seem to last me upwards of 10,000 miles.

I've swapped to Phil Wood and Superstar hubs on my main ride, which take stock bearings, although I had to retire the Hope rear hub on my singlespeed after I bent the axle...but it was 25 years old.


Hmm, could you be a bit more specific about overhauling the bearings on UN91 BBs, please? I've only met with "bearing balls located directly in axle'groove" type Shimano old-school cartridge sq.taper BBs so far, thus redering these parts FUBAR/broken when opened by any special method on earth.

Maybe the UN90 series used generic, removable cartridge bearings?


Exactly as you describe - UN9x series can be dismantled and the bearings swapped, all others cannot.


Top
 Profile  
 
PostPosted: Mon Dec 09, 2019 12:52 pm 
Retro Guru
User avatar

Joined: Wed Mar 26, 2014 5:58 am
Posts: 714
Location: Wild-wild-wild-EAST
"Exactly as you describe - UN9x series can be dismantled and the bearings swapped, all others cannot."

I'm still puzzled by this "bearing swap" option since all XTR sq. BBs seem to have "monoblock" housing as UN7x-UN5x etc., BBs do. How are you supposed to remove the bearings from it then without damaging the housing permanently?


Top
 Profile  
 
PostPosted: Mon Dec 09, 2019 1:16 pm 
Retro Guru
User avatar

Joined: Thu Jun 23, 2011 11:25 pm
Posts: 2549
Location: It's not easy being a dolphin.
fearfactoryüberalles wrote:
"Exactly as you describe - UN9x series can be dismantled and the bearings swapped, all others cannot."

I'm still puzzled by this "bearing swap" option since all XTR sq. BBs seem to have "monoblock" housing as UN7x-UN5x etc., BBs do. How are you supposed to remove the bearings from it then without damaging the housing permanently?


viewtopic.php?f=1&t=178735

...something for you to try over winter :xmas-wink:


Top
 Profile  
 
PostPosted: Tue Dec 10, 2019 11:24 pm 
Old School Grand Master

Joined: Sun Oct 21, 2007 2:33 am
Posts: 5617
Location: WI, USA
When the market gets loaded with 27.5 and 29 the industry will find a reason to change back to 26....they must change it's what keeps the market moving/selling.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Wed Dec 11, 2019 1:56 am 
Retro Guru

Joined: Sat Apr 15, 2017 12:26 pm
Posts: 623
Location: Lost now on the country miles
26 has lost its niche to 27.5 and 29. It needs a new niche to make a comeback. That could be a new fad, fashion or form of fun. In some ways, single speed is a backwards step, but it has a niche in the market. Gravel bikes are not radically new but there's clearly s niche. Fully rigid steel mountain bikes have appeared from Marin and Genesis in recent years: perhaps a step back, but perhaps a new niche. If the good old 26 can fill a new niche in the market, it will come back. It might just be a fashion for a retro look: Bobbin have built a whole business based on bikes with a vintage look to them. I can't see 26 reclaiming its former dominance in the MTB market but it could easily find a new place in the market.

When looking at the whole wheel sizes debate a few years ago before getting a 27.5, I came across a comment on some forum saying that 27.5 was just a bit less nimble, a bit less flickable, a bit less fun. And so I have found it. 26 will come back in some guise if it can offer more fun.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Wed Dec 11, 2019 4:08 am 
Old School Grand Master
User avatar

Joined: Sat Jul 13, 2013 8:01 pm
Posts: 5563
^ Good post.

The iconic artisan bikes from the 80/90s will never be recreated to the exact same standards again imo. Many tubesets were custom spec and no longer made and the expertise and time consuming processes just too costly to recreate today. Sadly apart from most of us, few modern generation riders appreciate just how good these ‘old’ bikes are to ride - yet. It takes more skill to carefully pic a line rather than just blasting over everything on a modern full sus rig and thats more satisfying for many of us.


Top
 Profile  
 
PostPosted: Wed Dec 11, 2019 8:18 am 
King of the Skip Monkeys
King of the Skip Monkeys
User avatar

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 32276
Location: Bournemouth's most wanted
650d!


Top
 Profile  
 
PostPosted: Wed Dec 11, 2019 8:20 am 
Retro Guru
User avatar

Joined: Sat Apr 23, 2016 8:46 pm
Posts: 311
Location: Chorley
Motorcycle wheels have changed in size over the years, yet you can still easily get a good choice of tyres. I just hope that this is replicated with 26" MTB wheels. I've realised whilst looking for an amber walled tyre to replace my front Velociraptor that NOS may be my only choice. Rubber ages so I'm not that keen.


Top
 Profile  
 
PostPosted: Wed Dec 11, 2019 8:28 am 
King of the DuckBoard
King of the DuckBoard
User avatar

Joined: Sun Jan 28, 2007 12:30 pm
Posts: 21213
Location: 26 the only wheel size
doesn't BMX & trials bikes run 26 now?


Top
 Profile  
 
PostPosted: Wed Dec 11, 2019 8:37 am 
King of the Skip Monkeys
King of the Skip Monkeys
User avatar

Joined: Wed Nov 07, 2007 4:34 pm
Posts: 32276
Location: Bournemouth's most wanted
Dont get hung up on amberwall tyres. God knows how they took so much precedence, many bikes were offered with blackwall and as long as you can stand the shouty decals, there's still a good supply.

So few older tyres worked out in the real world anyway, but if someone does have a Wolber hanging around to pair with my lonely one or a set of Tioga Trail Dawgs, I'm all ears! :xmas-big-grin:


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 73 posts ]  Go to page Previous  1 ... 4, 5, 6, 7, 8  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: Heavy, Mikey657, paddlingpool, rblurt84, retrobikeguy, Tomianson, wesmamyke, Woz and 103 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 © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group