Michelin D.R. Tyres

Michelin D.R. Tyres of the Thirties

Vintage Cross-ply Michelin D.R. tyres with bead wires

Crossply Tyres

17" Rim Size

Click to View Tread	Diameter (mm)	Section Width (mm)	Whitewall (")	Price (ex VAT)
650/700x17 Michelin D.R.	789	194		£231.00

18" Rim Size

Click to View Tread	Diameter (mm)	Section Width (mm)	Whitewall (")	Price (ex VAT)
475/525x18 Michelin D.R.	750	146		£199.00
550x18 Michelin D.R.	765	158		£211.50
600/650x18 Michelin D.R.	790	175		£229.00

19" Rim Size

Click to View Tread	Diameter (mm)	Section Width (mm)	Whitewall (")	Price (ex VAT)
400/450x19 Michelin D.R	738	128		£199.50
475/500x19 Michelin D.R	768	143		£211.50
525/600x19 Michelin D.R.	805	168		£229.00

20" Rim Size

Click to View Tread	Diameter (mm)	Section Width (mm)	Whitewall (")	Price (ex VAT)
650/700x20 Michelin D.R.	862	197		£303.00

21" Rim Size

Click to View Tread	Diameter (mm)	Section Width (mm)	Whitewall (")	Price (ex VAT)
550/600x21 Michelin D.R.	855	174		£285.00
700x21 Michelin D.R.	904	198		£336.00

Replacing beaded edge tyres, cross-ply tyres with bead wires formed the second generation of detachable tyres. These tyres benefited from two major innovations: the introduction of carbon black and the appearance of textile wire cords in the tyre carcass.

Increased service life of the Michelin D.R. tyres

The incorporation of wires into the bead in 1925 led to an improvement in tyre retention on the rim. These tyres also benefited from two major innovations prior to their creation: - the introduction of carbon black in 1917 which led to a five-fold increase in tyre service life - the appearance of layers of textile wire cords parallel with each other in the tyre's carcass, which gave rise to the so-called "cable" tyre in 1919 and the "cable confort" in 1923, the first low pressure car tyre (2.5 bars 36 psi).

DOUBLE RIVET

"Double rivet" or D.R. is in fact the name of a tread pattern which first saw the light of day with the first generation of tyres for motor cars, beaded edge tyres. This tread pattern was retained for first tyres with bead wires in 1925. This tread pattern, with its old-fashioned appearance, was truly revolutionary at the time. It was also the inspiration for the first radial tyres.