Retrobike Forum Index

It is currently Sun Dec 16, 2018 8:23 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 15 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Sat Oct 20, 2018 9:16 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1179
Having a baby was a perfect excuse to build a specific bike for a specific purpose.

My main road bike is too nice and the riding position difficult. My main full sus MTB wouldn't fit a seat. My Orbit is setup for long days out and kept at the in-laws.

So yeah, I needed another bike. A vintage MTB is perfect for a baby seat carrier- upright postion, comfortable.

I spotted this Giant Super Sierra in the classified by Brocklander. Now back in...er.. 1990/1 when I started mountain biking an older local kid had one of these. I remember it being plated and lacquered and looking tatty, then he stripped the lacquer and it just looked out of this world - like bare metal.

Perfect.

Here is the starting point - thanks brocklander!

Image

This was a top of the line bike in 1988, full XT m730:

Image


Last edited by was8v on Sat Oct 20, 2018 9:54 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Sat Oct 20, 2018 9:38 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1179
I stripped the lacquer with nitromors, this brought it up reasonably well but it needs polishing.

The plastic SKF BB took some fight, blowtorch and lump hammer together would not shift it. Had to drill a series of holes in the plastic to get it out.

Built it up 9speed 11-40T using a 11-34 sram cassette and a modified 40T hope expander.

Use an aliexpress "goatlink" on the 9spd LX mech and a 9spd Sunrace thumby. Finished the drivetrain with a 34T narrow wide chainring on M730 cranks.

Lightweight year 2000 Bontrager superstock wheels with Specialized FastTrack (LK) tyres mean the wheels spin up fast.

Rides fantastic - like I remember 80's MTBs - like a big BMX really. The simple gearing really suits it.

Just looking out for a black XT front brake now, and maybe a black 9speed rear mech that will look right if there is one.

Image
Image
Image
Image
Image
Image
Image
Image
Image
Image
Image


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Nov 15, 2018 5:38 pm 
Old School Hero
User avatar

Joined: Wed Jan 24, 2007 7:42 am
Posts: 210
Location: Netherlands
Nice, but te picture is from a 1987 model, the frame is a little bit different. The original groupset is a mix of SunTour index XC5000 shifters-brakelevers and XC7000 derailleurs, SunTour hubs, Shimano Deore canti & U-brake en Shimano crankset

https://flic.kr/p/gczJEH

Click below on 1987 ......


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Nov 15, 2018 8:52 pm 
Dirt Disciple
User avatar

Joined: Sun Oct 21, 2018 11:46 am
Posts: 51
I'm liking this and you are right the black would look good.


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Nov 15, 2018 9:23 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Fri Feb 06, 2009 11:13 pm
Posts: 10874
Location: Skipton
Great to see this old girl up and running! 8)


Top
 Profile  
 
 Post subject: Re:
PostPosted: Thu Nov 15, 2018 10:00 pm 
Retro Guru
User avatar

Joined: Sun Jul 09, 2006 11:07 pm
Posts: 1778
Location: muddy fields, usually
Looks great..! What bars are you using?


Top
 Profile  
 
PostPosted: Fri Nov 16, 2018 11:06 am 
Retro Guru
User avatar

Joined: Mon Jun 20, 2011 10:51 am
Posts: 461
Location: Bolton
Really cool, I love homebrew build's like this.

I've just educated myself on those trick components you used to get the gearing (goatlink, cassette expander) which is going to help on future builds for me.


Top
 Profile  
 
PostPosted: Fri Nov 16, 2018 1:11 pm 
Retro Guru

Joined: Tue May 11, 2010 6:39 pm
Posts: 710
Location: North London
Yeah I like this.


Top
 Profile  
 
PostPosted: Wed Nov 21, 2018 9:49 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1179
Thanks guys!

Been using it quite a bit to get to the local shop and take my boy on the bike.


Top
 Profile  
 
PostPosted: Wed Nov 21, 2018 9:52 pm 
Retro Guru

Joined: Mon Apr 03, 2006 5:11 pm
Posts: 1179
Joe_Rides wrote:
Really cool, I love homebrew build's like this.

I've just educated myself on those trick components you used to get the gearing (goatlink, cassette expander) which is going to help on future builds for me.


Gearing works great for the usage - highest gear isn't all that high though.

I used a Hope 40T expander, these are designed fo 11-36 10spd cassettes, I just reduced the height of the machined in spacer section to mate it to the 34t of the 9spd. I dropped one of the cogs our of the lower end of the cassette. Loads around used as people move to 11spd (I paid £10).

The goatlink allows the mech to shift up to it - £2 on aliexpress!

The narrow wide chainring means it doesn't;'t drop the chain, again bought from aliexpress. 110 bcd same as road cranks.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 15 posts ]  Go to page 1, 2  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: HK-II and 12 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