Malvern (1) Star odd frame size

[landscapecadmonkey]

picked up a very low spec MS in the last Hard Rubbish round in west end....

Odd frame measurement. 62ST 56TT. Thought it was one for the back of the shed, but, with the seat hugging the TT, it fits me like a dream.

Quick rub down of frame and some supacheap replacement parts should see it back on the road.

Does anyone have a reason (marketing, retro or philosophic) as to why it has such odd dimensions ???

[munga]

biggest tt length they could do with that gaspipe?

[cotterpin]

Does anyone have a reason (marketing, retro or philosophic) as to why it has such odd dimensions ???

Being a mass produced frame, the 56cm top tube was probably used in frames ranging from 62cm down to 55cm seat tubes.
Without going into a major spiel about geometry/frame design, this method equates to speed of production on a semi
automated assembly line, i.e one Main and Head tube assembly compatible with three or four frame sizes.

Cheers

[landscapecadmonkey]

Does anyone have a reason (marketing, retro or philosophic) as to why it has such odd dimensions ???

Being a mass produced frame, the 56cm top tube was probably used in frames ranging from 62cm down to 55cm seat tubes.
Without going into a major spiel about geometry/frame design, this method equates to speed of production on a semi
automated assembly line, i.e one Main and Head tube assembly compatible with three or four frame sizes.

Cheers

cool.

as a kid in the early 70s i seem to remember adult (racer) bikes without excessive or outrageous seat post lengths..... so that seems to fit.

just thought id tapped a weird long legged, short armed market bike.

[landscapecadmonkey]

biggest tt length they could do with that gaspipe?

wonder if a 25mm seat post makes up for the 'gaspipe' loading ? (prob not)

[Rob74]

Some 25" Nominal CrMo Frame Measurements below.

1990 Tange Prestige CrMo Sports =>> 580 TT, 625 ST, 865 Standover Height, 260 BBH, 1020 FAxle to RAxle.

1987/88 535Pr CrMo Sports =>> 560TT, 635ST, 885 Standover Height, 270BBH, 990 FAxle to RAxle with Race Fork (or 1008 FAxle to RAxle for Std Fork).

1988/89 Tange Infinity CrMo Sports =>> 555 TT, 610 ST, 865 Standover Height, 270 BBH, 998 FAxle to RAxle.

1987/88 531C CrMo Race =>> 570 TT, 620 ST, 875 Standover Height, 275 BBH, 992 FAxle to RAxle.

1986 Columbus SLX CrMo Race =>> 575 TT, 623 ST, 860 Standover Height, 260 BBH, 980 FAxle to RAxle.

Rob.