Differences

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--- tech:rear [2022/01/04 09:09] – created mtbtimeline
+++ tech:rear [2023/09/09 12:14] (current) – mtbtimeline
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 <div column 50% #rear>
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 ===== Rear Shock Absorbers =====
-The 1983 [[mcr:start|Skinner Descender]], pictured in the previous [[tech:start#disc|section]] on disc brakes, used a [[https://en.wikipedia.org/wiki/Honda_XR_series#XR_200|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 [[https://www.pinkbike.com/news/the-short-turbulent-life-of-urt-suspension-mtb-history.html|sweet spot]] of where and how to pivot rear suspension to achieve firm pedaling, plush riding, balanced handling - along with being strong, light & cheap.
+The 1983 [[mcr:start|Skinner Descender]], which was also a pioneer in the use of [[tech:start#disc|disc brakes]], used a motorcycle [[https://en.wikipedia.org/wiki/Honda_XR_series#XR_200|Honda XR200 Pro-Link]] shock, which had 16 compression settings and 4 rebound adjustments, which was originally made for Honda's 220 pound, 30HP "light weight" motocross racing motorcycle.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.  Nonetheless, it was raced downhill and should get the prize as the first rear suspended mountain bike.
+\\
+The next //thirty years// of suspension development has been spent on seeking the [[https://www.pinkbike.com/news/the-short-turbulent-life-of-urt-suspension-mtb-history.html|sweet spot]] of where and how to pivot rear suspension to achieve firm pedaling, plush riding, balanced handling - along with being strong, light & cheap.
 \\
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-{{radac.jpg?300|1980 Bridgestone Radac Fitness SE}}
+{{radac.jpg?320|1980 Bridgestone Radac Fitness SE}}
 \\
 Bridgestone Radac Fitness SE
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-{{mcr:moto.jpg?300|1975 Yamaha Moto-Bike}}
+{{mcr:moto.jpg?320|1975 Yamaha Moto-Bike}}
 \\
 Yamaha Moto-Bike
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 <div column 45%>
-{{mcr.jpg?300|1984 MCR}}
+{{mcr:1983.jpg?300|1983 Skinner Descender}}
+\\
+MCR Skinner Descender
+[[http://mombatbicycles.com/MOMBAT/BikeHistoryPages/Descender.html|mombat]]
+{{mcr.jpg?260|1984 MCR}}
 \\
 MCR
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 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.
+\\
+=== 1985 Shuler Victor ===
+Rear only spring.  1.5" rear travel.  No dampening.  Springs customized for specific rider weight.  28 pounds.
+\\
+Jerry Shuler would later make a similarly suspended //Rogg Mountain Bike// (1989), see [[http://mombatbicycles.com/MOMBAT/BikeHistoryPages/Shuler.html|mombat]]. Jerry later founded //Boulder Bikes//, which are next on the list:
+</div>
+<div column 45%>
+{{shuler.jpg?360|1985 Shuler Victor}}
+\\
+Shuler Victor [[http://mombatbicycles.com/MOMBAT/BikeHistoryPages/Shuler.html|mombat]]
+</div>
+<div column 50% #rear1a>
+=== 1988 Moulton AM-ATB ===
+Leading link front, rubber bumpers rear and foldable for transport.  Partially made by [[kuwahara:start|Kuwahara]].  Arguably the first "mass produced, full suspension mountain bike."
+\\
+Shimano 600SIS (1986-87), which only has a 28T capacity.  20" wheels.  Only 361 AM-ATBs made between 1988 -> 1992.((See more at: [[http://mombatbicycles.com/MOMBAT/Bikes/1989_Moulton_ATB.html|mombat]].))
+</div>
+<div column 45%>
+{{moulton.jpg?360|1988 Moulton AM-ATB}}
+\\
+Moulton AM-ATB [[http://www.bicyclemuseum.com/?s=moulton|bicyclemuseum]]
+</div>
+<div column 50% #rear1b>
 === 1989 Boulder Gazelle ===
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 === 1990 Offroad Pro-Flex RF-1 ===
-The //"first commonly available full-suspension mountain bike"//(([[http://mombatbicycles.com/MOMBAT/BikeHistoryPages/ProFlex-Girvin.html|mombat]] October 1990 Bicycling review)).  Elastometer single pivot rear with an Offroad Flex-Stem on the front.  $1500, 28 pounds, 2 inches of rear travel.
+The //"first commonly available full-suspension mountain bike"//(([[http://mombatbicycles.com/MOMBAT/BikeHistoryPages/ProFlex-Girvin.html|mombat]] October 1990 Bicycling review, which ignores the Moulton - which was not widely distributed.)).  Elastometer single pivot rear with an Offroad Flex-Stem on the front, which counts as front suspension.  $1500, 28 pounds, 2 inches of rear travel.
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 === 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.
+Less than one inch of rear 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 [[https://moots.com/bike/routt-ybb/|makes]] these!  For //**$10,954!**//
+Moots still [[https://moots.com/bike/routt-ybb/|makes]] these.  For //**$10,954!**//
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 Four pivots.  Front air-oil damping, elastometer rears.
-Despite its name, the RS-1 did not use Rockshox RS-1's((However, the 1990 prototype RS-1 did use the RS-1 front shocks.  See: [[https://mbaction.com/throwback-thursday-mountain-bike-suspension-from-30-years-ago/|mbaction]]))
+Despite its name, the RS-1 did not use Rockshox RS-1's((However, the 1990 prototype RS-1 did use the RS-1 front shocks.  See: [[https://mbaction.com/throwback-thursday-mountain-bike-suspension-from-30-years-ago/|mbaction]]))  Note the very early use of disc brakes, using [[https://www.hopetech.com/history/the-nineties/|Hope]] disc brakes ((Hope discs have a spiral pattern of holes, while Pro-Stops, used on later RS-1's, used a slot pattern of rotor cooling.)) and their matching hubs.
 Mert Lawwill's((The inventor of the [[lawwill:start|Lawwill]] Pro-Cruiser)) father's personal bike.
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 ----
-=== 1994 Kestrel Rubicon ===
+=== 1994 Kestrel Rubicon Comp Kamikaze ===
-A downhill racer with **8"** of rear travel.  The 63t chainring didn't pedal out until 50mph.
+A downhill racer with **8"** of rear travel.  The 63t chainring didn't pedal out until 50mph.  The high seat was needed as downhill courses required a lot of pedaling in the 90's.  Was it possible to lower the seat??
 <blockquote>
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 <div column 45%>
-{{rubicon.jpg?360|1994 Kestrel Rubicon}}
+{{rubicon.jpg?360|1994 Kestrel Rubicon Comp Kamikaze}}
 \\
-Kestrel Rubicon [[https://www.theproscloset.com/blogs/news/five-vintage-full-suspension-bikes|The Pro's Closet]]
+Kestrel Rubicon Comp Kamikaze[[https://www.theproscloset.com/blogs/news/five-vintage-full-suspension-bikes|The Pro's Closet]]
 </div>
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 \\
 Cannondale Fulcrum DH [[https://www.theproscloset.com/blogs/news/five-vintage-full-suspension-bikes|theproscloset]]
+</div>
+<div column 50% #s1940>
+----
+=== 1940 Randonneur ===
+Suspension pre-history and of mountain biking in general.  Very early full suspension French randonneur.
+\\
+Steel frame with lugs and brass fillets.  Super Rapid 3-speed rear derailleur and shifters.  Wooden rims.  Front and rear spring shocks with rear pivots at both the bottom bracket and dropouts..
+</div>
+<div column 45%>
+{{1940.jpg?300|1940 Randonneur }}
+\\
+Randonneur
+[[https://steel-vintage.com/products/original-prototype-randonneur-silver|steel-vintage]]
 </div>