Did some 1970's Road bikes have 26 inch tyres ?

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BADGER.BRAD

Legendary Member
Location
Shropshire
Hello all,

Am I cracking up ? I seem to remember Road Bikes ( Racers we called them) Had either 26 or 27 inch tyres , I have had a few with 27 inch tyres /wheels but am I just imaging the 26 inch wheels ?
 

Vapin' Joe

Formerly known as Smokin Joe
No, you're not. They were nearly all low end machines, known at the time as "Sports bikes".
 

Punkawallah

Veteran
26” is about 660mm, which would be a big wheel. The 630mm wheel on my Galaxy takes a 27” tyre - could it refer to the size of the tyre?
 

midlife

Legendary Member
By the 70’s essentially all adult “racing bikes with gears and dropped bars had 27 x 1/14 high Pressure (presta) wheels. Smaller racing bikes such as Raleigh Hustjer had 26 “ wheels but that was to fit in the smaller frames

Roadsters had 26” wheels (Raleigh Watferer etc) shrader valves as woods valves went out a few years before.
 
OP
OP
BADGER.BRAD

BADGER.BRAD

Legendary Member
Location
Shropshire
So at least I'm not cracking up !

27 x 1/14 high Pressure (presta) wheels
Speaking of Presta Valves I can remember puncture kits having a short length of rubber tube in order to repair the valves !
 
Back in those days, measurements were all imperial.

Cranks were 6 1/2 ins
Stems were in inches, e.g. 6" stems
Frame sizes also e.g. 23"
Wheel nuts were 1/2 in front and 9/16 rear

I'm a bit surprised that we still have chains with 1/2 inch pitch.

Most conventional round tubed diamond frame bikes still have imperial seat tube diameters - disguised as metric.. 28.6mm, 31.8mm and 34.9mm. Other imperial dimensions are hidden away elsewhere, your 22.2mm handlebars for instance.
 
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