mtb-timeline

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Mountain Bike Technology

Mountain bikes, with their new and demanding requirements, have driven much bicycling innovation. Or have they? As with most invention, it's not so much novel inventions but combinations of existing solutions and being first to market. The following will show the first use of new mountain biking tech and their origins.

←- disc brakes ←- front shocks ←- rear shocks ←- dropper posts

1891 Velocipede bikeradar
Trailing link suspension front, Linkage driven low single pivot rear suspension. How modern is that?

Disc Brakes

Shimano introduced mass produced, cheap, disc brakes in 1972 with the Shimano B 700, followed a year later, in 1973, with the hydraulic B900 - and then many other manufacturers jumped on board. Unfortunately, they were usually placed with low end, department store bikes, and hence never rose above obscurity and respectability.

Mountain Cross Racing were far ahead of the curve in using the best technology for their downhill machines. The example below was made by Victor Vincente of America with Brian Skinner in 1983. Later MCRs lost weight, became refined and successful at winning downhill races. Despite their success on the race course, few were Descenders made.

Despite MCR's limited early success, it would be another six years before Mountain Cycle made the first mountain bike specific disc brakes in 1989. Other mountain disc brake makers soon followed:

1991 : Hope
1993 : Formula - fully hydraulic
1995 : Amp Research

1983 MCR Skinner Descender mombat
Rear disc brakes only, with cantilever fronts.

1980 Phil Wood Disc Brakes bikeforums
Disc brake overkill for a mountain bike - but they sure look like they work!¹⁾

1991 Hope Disc Brakes mombat
Disc brakes from a full-suspension 1991 Fisher RS-1²⁾

1973 Schwinn Lemon Peeler mecum
Five speed stick shift, front suspension and Schwinn rear disc brakes.

1991 Mountain Cycle Pro Stop pinkbike
In 1989, Mountain Cycle made perhaps the first disc brakes specific to mountain biking: the Pro-Stop cable actuated hydraulic disc brakes mated to their Suspenders inverted fork.

1993 Formula Standard rideformula
The first fully hydraulic mountain bike disc brakes.

Front Shock Absorbers

Suspension, which has been fitted to velocipedes since at least 1891, needs shock absorbers to dampen the recoil or it risks turning the bicycle into a pogo stick. Mountain bikes initially borrowed suspension inspiration and hardware from motorcycles. The trick was to make something light weight which could handle going down Repack, or more pertinently for 1988, the Mammoth Mountain Kamikaze Downhill.

The first mountain bike suspension fork was made by RockShox, designed by Keith Bontrager and Paul Turner. A non-working concept fork was mated to a fully carbon, rear suspended Kestrel Nitro and shown at the January 1988 Long Beach bike show. Unfortunately, the Nitro was just a prototype and Kestrel wouldn't release a fully suspended mountain bike until 1995. ³⁾ RockShox would go on to great success, selling $100M annually by 1996. ⁴⁾⁵⁾

After the debut of RockShox all makers of motorcycle shocks saw the light and immediately jumped into the market.

1990 Manitou Fork |retrobike
1990 Marzocchi Star pinkbike
1990 Mountain Cycle Suspenders pinkbike

1991 saw the introduction of mono-shocks.

1992 Canondale HeadShok theoproscloset
1991 Action-Tec Pro Shock Aaction-Tec
1991 Lawwill Leader vintagesteelrider

Canondale's HeadShok used a single air/oil damper with needle bearings to eliminate twisting. Twisting (and oil leakage) plagued early RockShox RS-1 and Mag-20's, requiring heavy brake braces for stability. The Lawwill Leader linkage design weighed about 3.5 pounds.

And, somehow just before mechanically complicated shocks hit the market, a number of very simple flex stems became available.

1988 Offroad Flex Stem worthpoint
1989 Softride Suspension System sscycleworks
1994 Softride Ahead Stem mombat

Year	Make/Model	Type	Travel
1988	Offroad Flex Stem	stem	10mm
1989	Softride Suspension System	stem	63mm
1989	Rock Shox RS-1	fork	48mm
1990	Manitou	fork	38mm
1990	Mountain Cycle Suspenders	fork	63mm
1991	Action-Tec Pro Shock	mono-shock	44mm
1991	Lawwill Leader	mono-shock	63mm
1992	Canondale Headshok	mono-shock	50mm
1994	Softride Ahead Stem	stem	76mm

1988 Kestrel Nitro sfomuseum
The 1988 Kestrel Nitro was ground breaking. The first all-carbon, fully suspended mountain bike frame. Equipped with a prototype RockShox.

1989 Greg Herbold issuu
In 1989, Greg won at Mammoth using a prototype RockShox RS-1. RockShox went into production in August 1989.

1990 RS-1 ad, when they first became widely available. vitalmtb

Rear Shock Absorbers

The 1983 Skinner Descender, pictured in the previous section on disc brakes, used a Honda XR200 Pro-Link shock, which had 16 compression settings and 4 rebound adjustments, which was made for their 220 pound, 30HP “light weight” motocross racing motorcycle. The 1983 bicycle built with those shocks weighed 50 pounds and was lucky to get 1/2 HP powering it. The next thirty years of suspension development has been spent on seeking the sweet spot of where and how to pivot rear suspension to achieve firm pedaling, plush riding, balanced handling - along with being strong, light & cheap.

Pre-Mountain Bike

1980 Bridgestone Radac Fitness SE bukalapak

Front and rear suspension, with rear elastometer shock absorbers.

1975 Yamaha Moto-Bike bmxmuseum

Fully suspended BMX with drum brakes. And those front forks are actually oil dampened shock absorbers! It was achingly close to being a decent downhill bike, but not really.

1984 MCR smugmug
In 1984, the MCR lost 20 pounds and became the Skinny Descender at 30 pounds. Is that Aluminum?

How to find the suspension Sweet Spot pinkbike

Mountain Bike Specific Rear Shocks

By 1991 there were about ten manufacturers of fully suspended mountain bikes. The following is just a sample of early design styles. The evolution of rear shocks continues today. Early shocks came close, but lagged in durability, weight, cost, and especially performance.

1989 Boulder Gazelle

Rear only spring. Remote rear lockout on handlebars. $2000. 2.6“ rear travel. First offered in 1989. See: March 1989 Bicycle Guide

The pic is from a 1990 Gazelle. The 1989 did not have front suspension.

1990 Boulder Gazelle mtbr

1990 Offroad Pro-Flex RF-1

The “first commonly available full-suspension mountain bike”⁶⁾. Elastometer single pivot rear with an Offroad Flex-Stem on the front. $1500, 28 pounds, 2 inches of rear travel.

1990 Offroad Pro-Flex RF-1 flickr

1991 Moots YBB

<1 inch travel. Pivotless. Pivotless suspension remains popular today, as it's light weight, durable, and cheap but doesn't offer much in the way of travel and damping.

Moots still makes these! For $10,954!

1991 Moots YBB bikeforums, Bicycling, April 1991

1991 Manitou

Manitou simply stuck their successful front shocks on the rear, with two pivots. Elastometer shocks.

1991 Manitou theproscloset

1991 Fisher RS-1

Four pivots. Front air-oil damping, elastometer rears. Despite its name, the RS-1 did not use Rockshox RS-1's⁷⁾

Mert Lawwill's⁸⁾ father's personal bike.

1991 Fisher RS-1 mombat

1993 AMP Research B-2

The Horst Link, introduced with the 1993 AMP Research B-2, has been hugely successful and the four pivot design remains in production today. The front shocks, not so much. 24 pounds!

1993 AMP Research B-2 vintagemtbworkshop

1993 Yeti ARC ASLT

This design won many, many races and is very similar to today's designs.

Manitou 2/3/RockShox hybrid forks both in front and in back, with a single Risse damper. Low single pivot design in the back.

Missy Giove's personal racing machine.

1993 Yeti ARC ASLT theproscloset

1994 Kestrel Rubicon

A downhill racer with 8” of rear travel. The 63t chainring didn't pedal out until 50mph.

The long and slender swing-arm driving the rear suspension was laterally flexy, and it actually snapped during a race in 1994. The Pro's Closet

1994 Kestrel Rubicon The Pro's Closet

1995 Ibis Szazbo

The first Unified Rear Triangle (URT) suspension bike. 5“ of travel. An evolutionary dead end.

1995 Ibis Szazbo http://vintagemtbworkshop

1995 Dan/Ed

Just a big block of rubber by the square down-tube (the better to mount the block with.) Belt drive with an internal hub. To be fair, it's a very clean look.

1995 Dan/Ed tumblr

1996 Moots DH88/Malcolm

The late 90's were a lost time in suspension design, with a lot of ideas tossed onto the dust heap of history. It's better to highlight just a few standouts, for one reason or another.

Obviously there's some wasted titanium here. Perhaps to humorously emphasize the ludicrousness of the design. It supposedly worked. The rear is pivot-less at the bottom bracket.

1996 Moots DH88/Malcolm ebay

1997 Ibis Bow Ti

The ultimate in extravagant, pivot-less design. Except that the shocks had a two way pivot as the thin wall titanium frame flexed so much. $3500, frame only. Five inches of travel.

The pic is a 1998.

1998 Ibis Bow Ti vintagemtbworkshop

1998 Cannondale Fulcrum DH

By this point downhill bikes are designed completely differently than their cross country mountain bike ancestors. Weight is not an issue. Pedaling uphill is not a thing. And with race bikes, neither is cost. Their designs are worth a look, as they're sooo pretty…

The Fulcrum used three chains, and five cogs were in use at any time,

Ultimately, the Fulcrum DH was too heavy, a headache to maintain, and too expensive. It was estimated that each bike cost $20,000-30,000 to manufacture. The Fulcrum DH had the potential to be further refined, but unfortunately, the program was canceled after just two years. The Pro's Closet

Drivetrain Detail theproscloset

1998 Cannondale Fulcrum DH theproscloset

Dropper Posts

A truly and uniquely mountain bike specific invention. The first incarnation, the Hite Rite [1984] from Joe Breeze, usually required you to slow down and fiddle with the seatpost quick release - all without putting a foot on the ground. Soon came remote cable activation for the Hite Rite from IRD [1988], and only much later did internal pneumatic dropper posts come to the market. How did we live without this for so many years?

Who was first? As with most inventions, it's a matter of patents and sales. For example, Kind Shock [1998] developed a prototype post from an office chair pneumatic lift, but waited 12 years to develop it to market.⁹⁾ So, it doesn't count - but it's very close.

Patents in this case aren't the best indicators of “practical inventions,” as many adjustable height seats were patented but none came to market, or they were excellent ideas which never proved to be practical, either because they couldn't be developed or because they couldn't sell them.

So, first to market and sales wins. Even if they later lose a patent infringement lawsuit.

Gravity Dropper [2003] is acknowledged as the first dropper post and was quickly followed a year or two later by Maverick, RockShox, Crank Bros., etc. Why not Hite Rite? Because it was frustrating to use while moving and would easily get out of adjustment. But it remains a huge innovation from the man who “invented” the first mountain bike eight years prior.