Sloping Top Tube Vintage Road Bikes
12-07-20, 10:20 AM
#26
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Chesini Innovations are lovely bikes - opinions differ on who actually produced the first 'modern era' compact (and I don't think it was Chesini) but these certainly predate the Giant bikes.
12-07-20, 10:43 AM
#27
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Good lord, I forgot how hideous those were. That seatpost design never made sense to me. I can't imagine it is actually more aero than a round tube, unless it is slammed like in the photo. If you are shorter than that, you are SOL.
Coming from a mountain bike background, longer seatposts + stems always looked right to me, especially compared to the "slammed" or "fist" amount of post showing. But this? Nope.
Specific to this picture alone, why would someone photograph a bike with the chain half-way between chainrings??
Coming from a mountain bike background, longer seatposts + stems always looked right to me, especially compared to the "slammed" or "fist" amount of post showing. But this? Nope.
Specific to this picture alone, why would someone photograph a bike with the chain half-way between chainrings??
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12-07-20, 10:54 AM
#28
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12-07-20, 06:55 PM
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Sloping top tube? Been around for a long long time. Just a wee joke. I know that this is not what the OP meant. The only sloping top tube vintage road bike to ever come my way was a bike whose name I cannot even remember...
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12-08-20, 10:51 AM
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The same thing is happening again... this time with disc brakes. Bike manufacturers are finding that consumers overwhelmingly prefer disc brakes, leaving the rim brake models left unsold.
12-08-20, 04:53 PM
#33
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09-05-22, 03:36 PM
#34
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09-06-22, 04:36 AM
#35
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Sloping Top Tubes
In the late 80's or thereabouts hybrid bikes became popular. As MTBs started becoming more radical with suspensions and so on, hybrid bikes filled the niche between them and road bikes.
In general they had upright bars more suitable for urban use plus more sensible road style 700 x 35c or 38c tires rather knobies. The advantage of a sloping top tube was a lower stand over height near the seat plus the bars were higher for upright riding.
I recall that Bianchi and I think that Giant made a lot of them.
I built this rough stuff frame one afternoon in 1992. I used heavy gauge Reynolds 531 and a short wheel base for honking out of the saddle while climbing off road. It was pretty much a copy of a frame I built one afternoon back in 1976 that got stolen. I added the sloping top tube to compensate for the 11 1/2" BB height.
I was having some neck problems at the time so I had Salsa make me a short reach high rise stem. The frame was set up to switch to drop bars, also cyclocross sewups. Those were 700 x 41c Specialized Nimbus tires.
This was fast and dirty project using what I had on hand as far as lugs and tubing. The Bocama seat tube lug was modified to 76° and the front to about 71°. If I were going to do it over again, I'd do it right and and use a steeper angle top tube.
Over the years I "ovalized" three 26T TA Cyclotouritse chain rings so I switched to a Shimano Deore XT crank.
verktyg
In general they had upright bars more suitable for urban use plus more sensible road style 700 x 35c or 38c tires rather knobies. The advantage of a sloping top tube was a lower stand over height near the seat plus the bars were higher for upright riding.
I recall that Bianchi and I think that Giant made a lot of them.
I built this rough stuff frame one afternoon in 1992. I used heavy gauge Reynolds 531 and a short wheel base for honking out of the saddle while climbing off road. It was pretty much a copy of a frame I built one afternoon back in 1976 that got stolen. I added the sloping top tube to compensate for the 11 1/2" BB height.
I was having some neck problems at the time so I had Salsa make me a short reach high rise stem. The frame was set up to switch to drop bars, also cyclocross sewups. Those were 700 x 41c Specialized Nimbus tires.
This was fast and dirty project using what I had on hand as far as lugs and tubing. The Bocama seat tube lug was modified to 76° and the front to about 71°. If I were going to do it over again, I'd do it right and and use a steeper angle top tube.
Over the years I "ovalized" three 26T TA Cyclotouritse chain rings so I switched to a Shimano Deore XT crank.
verktyg
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Don't believe everything you think! History is written by those who weren't there....
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Don't believe everything you think! History is written by those who weren't there....
Chas. ;-)
Last edited by verktyg; 09-06-22 at 04:44 AM.
09-07-22, 01:06 PM
#36
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Thread Starter
In the late 80's or thereabouts hybrid bikes became popular. As MTBs started becoming more radical with suspensions and so on, hybrid bikes filled the niche between them and road bikes.
In general they had upright bars more suitable for urban use plus more sensible road style 700 x 35c or 38c tires rather knobies. The advantage of a sloping top tube was a lower stand over height near the seat plus the bars were higher for upright riding.
I recall that Bianchi and I think that Giant made a lot of them.
I built this rough stuff frame one afternoon in 1992. I used heavy gauge Reynolds 531 and a short wheel base for honking out of the saddle while climbing off road. It was pretty much a copy of a frame I built one afternoon back in 1976 that got stolen. I added the sloping top tube to compensate for the 11 1/2" BB height.
I was having some neck problems at the time so I had Salsa make me a short reach high rise stem. The frame was set up to switch to drop bars, also cyclocross sewups. Those were 700 x 41c Specialized Nimbus tires.
This was fast and dirty project using what I had on hand as far as lugs and tubing. The Bocama seat tube lug was modified to 76° and the front to about 71°. If I were going to do it over again, I'd do it right and and use a steeper angle top tube.
Over the years I "ovalized" three 26T TA Cyclotouritse chain rings so I switched to a Shimano Deore XT crank.
verktyg
In general they had upright bars more suitable for urban use plus more sensible road style 700 x 35c or 38c tires rather knobies. The advantage of a sloping top tube was a lower stand over height near the seat plus the bars were higher for upright riding.
I recall that Bianchi and I think that Giant made a lot of them.
I built this rough stuff frame one afternoon in 1992. I used heavy gauge Reynolds 531 and a short wheel base for honking out of the saddle while climbing off road. It was pretty much a copy of a frame I built one afternoon back in 1976 that got stolen. I added the sloping top tube to compensate for the 11 1/2" BB height.
I was having some neck problems at the time so I had Salsa make me a short reach high rise stem. The frame was set up to switch to drop bars, also cyclocross sewups. Those were 700 x 41c Specialized Nimbus tires.
This was fast and dirty project using what I had on hand as far as lugs and tubing. The Bocama seat tube lug was modified to 76° and the front to about 71°. If I were going to do it over again, I'd do it right and and use a steeper angle top tube.
Over the years I "ovalized" three 26T TA Cyclotouritse chain rings so I switched to a Shimano Deore XT crank.
verktyg
