1991 Rocky Mountain Weasel  

 This bike has been a neat one to figure out. We are going with 1991 since many of the parts date code as 1991 but it could easily be 1992 as well.  The frame is beautifully made with very nice fillet brazing work but then it has mid-level parts on it.  The 500 CX crank with 30/40/50 rings was also a little strange but was likely added to make up for the 24" wheels.  The front derailleur has also been lengthened to more closely follow the chain rings. The first thought was some type of trials bike with the 24" wheels and 15.5" tall bottom bracket but that didn't fit with the gearing.  A call to Rocky Mountain resulted in some head scratching until they contacted one of there long time builders who remembered the bike.  It was designed to be a courier bike and originally had some swinging pedal extensions on it which explained the tall bottom bracket.  Apparently, the extensions were removed somewhere along the line.  If anyone has any more information, please let us know and we will post up any additions.

UPDATE:  Talked to some more folks at Rocky Mountain and gleaned a few more details.  The bike was built around a swinging crank extension made by Ralph Lewis of South Africa.  Still don't have a set of the extensions but I did add a photo of Paula Newby-Fraser using a set on her tri bike.

  Click on thumbnails below for larger images:        

Weasel  Weasel  Weasel Weasel  Weasel  Weasel
Weasel  Weasel  Weasel
Weasel  Weasel  Weasel
Frame Tange Ultimate Cro-Moly, fillet brazed
Fork Ritchey Logic Cro-Moly, fillet brazed
Rear Shock NA
Rims Araya RM 20, hard anodized
Hubs Shimano Deore DX 
Spokes Stainless Steel
Tires Tioga Farmer John
Pedals Shimano Deore
Crank Shimano 500CX  30/40/50
Chain Shimano
Rear Cogs Shimano cassette, 7 speed
Bottom Bracket Shimano
Front Derailleur Shimano Top Pull, custom lengthened cage
Rear Derailleur Shimano Deore DX
Shifters Shimano Deore DX thumb shifter
Handlebars Rocky Mountain Alloy
Stem Cast alloy, high rise
Headset Shimano Deore XT
Brake set Shimano Deore cantilever
Brake levers Shimano Deore DX 2 finger
Saddle Bontrager C30
Seat Post Kalloy Cro-Mo
Colors Blue
Size 16" to top of seat tube
Serial #   028

MOMBAT links

Share this page with your friends:


Delicious Bookmark this on Delicious

Home MOMBAT home page

 Bikes List of bike in the MOMBAT collection

 History  Manufacturer histories and timelines

Parts  MOMBAT parts museum

Contact Talk to us or come see us!

 Store Buy MOMBAT merchandise

For Sale  Parts and accessories for sale

First Flight Bikes Check out the shop

 Mountain Goat Cycles Design your own


MOMBAT friends

More MOMBAT-themed resources.

Mountain Bike Hall of Fame

Charlie Kelly

Vintage Ritchey


Vintage Trek

Vintage Cannondale

Fat Chance



Vintage Catalogs


"I’ve seen mountain bike rides transform people – not just their bodies but their way of thinking. Their spirit." Charlie Cunningham