Tyre Dimensions

BTCC

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
inch
mminchmminchmminch
265/660R18slick/wet
10 – 11
10
65525.927810.92529.9

JCW

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100mph
235/610R17slick/wet
8.5-9.5
9
60823.92459.72268.9855

Cooper Trophy

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100mph
185/580R15slick/wet
6.5-7.5
7
583232058.11857.3878

GT

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
inch
mminchmminchmminch
235/640R18slick/wet
F 8.5-10
9
64025.22489.82289
245/650R18slick/wet
8.5-9.5
9
64825.526810.52469.6
265/660R18slick/wet
F 10-11
10
65525.927810.92529.9
285/660R18 slick/wet
F 10.5 -11.5
11
65525.830111.927710.9
285/680R18slick/wet
R 10.5-11
11
67926.730211.927010.6
305/660R18slick/wet
F 11.5-12.5
12.5
65625.83321329011.4
305/680R18slick/wet
F 11.5-12.5
12
6852733313.129011
310/710R18slick/wet
R 12.5-13
13
7112835413.930512
235/645R19slick/wet
8.0-9.5
8
64525.52319.12168.5
285/680R19slick/wet
10.5-11
10.5
68026.829311.527010.6
310/710R19slick/wet
R 12.5-13
13
7112835413.930512

Saloon Car

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
185/580R15slick/wet
6.5-7.5
7
583232058.11857.3878
200/580R15slick/wet
6.5-8.5
7.5
583232168.51957.7878
205/620R17slick/wet
7.0 - 9.0
7.5
61624.32158.52038822
235/610R17slick/wet
8.5-9.5
9
60823.92459.72268.9855
235/620R17slick/wet
8.5-9.5
9
62024.42489.82359.3826
245/650R18slick/wet
8.5-9.5
9
64825.526810.52469.6790

Sports Car

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
190/535R13slick/wet
7.5-9.5
8
54121.32218.71907.4946
230/570R13slick/wet
9.5 - 10.5
10
57522.628011.22359.2890
205/570R13slick/wet
8.0 - 9.5
9
57422.6255102058.1892
200/580R15slick/wet
6.5 - 8.5
7.5
583232168.51957.7878
265/605R16slick/wet
9.5 - 10.5
10
60823.927010.626010.2842
235/620R17slick/wet
8.5-9.5
9
62024.42489.8 2359.3826
290/645R17slick/wet
12.0-13.0
12
64225.332812.928611.3794
265/660R18slick/wet
10-11
10
65525.927810.92529.9
305/660R18slick/wet
11.5-12.5
12.5
65625.83321329011.4

Mini 7/Mini Miglia

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
500L 10CR70/CR65
3.5 - 5.5
4.5
49819.61656.51204.71029
160/490-10 slick/wet
5.0 - 7.0
6
48018.92148.41505.91067

Single Seater

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100mph
190/535R13slick/wet
7.5-9.5
8
54121.32218.71907.4946
205/570R13slick/wet
8.0-9.5
9
57422.6255102058.1892
230/570R13slick/wet
9.5-10.5
10
57522.628011.22359.2890

Goodyear Historic Radial

SizePattern
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
mminchmminchmminch
23.0x13.0-13Slick
14
58422.9940916.1031212.28
23.5x10.5-16Slick
10
59723.5028411.1826910.59
25.5x12.0-16Slick
12
64825.5134313.5031012.20
25.5x14.0-16Slick
14
64525.3938615.1935614.01
28.5x14.5-16Slick
13
72428.5039115.3937614.80

Goodyear Historic Formula

SizePattern
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
mminchmminchmminch
20.0x6.5-13Rain
6.0-8.0
53320.981967.721505.91
20.0x7.0-13Slick
6.0-8.0
52120.512299.021837.20
21.0x8.0-13 Slick
9
54621.49254102168.50
20.0x9.5-13Slick
10
51620.3127710.902319.09
22.0x9.0-13 Slick
8.0-10.0
57222.5128711.292349.21
22.0x9.0-13Rain
8.0-10.0
56922.4028211.102248.82
22.0x11.0-13Slick
11
57722.7131812.5127310.74
23.0x13.0-13Slick
14
58422.9940916.1031212.28

Goodyear Historic Prototype

SizePattern
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
mminchmminchmminch
25.5x12.0-18Slick
13
650.2425.634313.5031112.24
25.5x12.5-18 Slick
13.5
650.2425.636214.2532412.75
28.0x12.5-18Slick
13
711.22834313.5031812.51
28.5x14.5-18Slick
14.5
723.928.540615.9836814.48

Goodyear Historic Bias

SizePattern
Optimum
Rim Width
Diameter
Overall Width
Tread Width
inch
mminchmminchmminch
20.0x8.0-13Slick
6
51320.192369.292088.18
23.0x9.0-15Slick
7
58422.9926410.392369.29
23.0x10.5-15Slick
10
59423.3830011.8126410.39
26.5x8.0-15Slick
8
67326.4927910.982017.91
26.5x10.0-15Slick
10
68627.0032812.9125910.19
27.0x14.0-15Slick
17
68627.0047018.5037614.06
23.5x10.5-16Slick
11
59223.3030011.8125710.11
25.0x13.0-16 Slick
12
62224.4834813.7031512.40
27.0x14.0-16 Slick
14
67626.6140615.9834813.70
500-15 Blue StreakSlick
5
62224.481947.631435.62
600-15 Blue StreakSlick
8
64825.5126910.592138.38
700-15 Blue StreakSlick
9
68126.8130512.002218.70
800-15 Blue StreakSlick
10
68126.8133313.1125710.11

Formula Vee

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
120/590-15CR82
4.0 - 5.5
4.5
57922.81616.31204.7884
135/620-15CR82
4.0 - 6.0
4.5
61724.31907.51385.4830

Radical

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
190/535R13slick/wet
7.5-9.5
8
54121.32218.71907.4946
230/570R13slick/wet
9.5 - 10.5
10
57522.628011.22359.2890
205/570R13slick/wet
8.0 - 9.5
9
57422.6255102058.1892
200/580R15slick/wet
6.5 - 8.5
7.5
583232168.51957.7878
265/605R16slick/wet
9.5 - 10.5
10
60823.927010.626010.2842
235/620R17slick/wet
8.5-9.5
9
62024.42489.8 2359.3826
290/645R17slick/wet
12.0-13.0
12
64225.332812.928611.3794
265/660R18slick/wet
10-11
10
65525.927810.92529.9
305/660R18slick/wet
11.5-12.5
12.5
65625.83321329011.4

Revolution Sportscar

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
200/580R15slick/wet
6.5 - 8.5
7.5
583232168.51957.7878
265/605R16slick/wet
9.5 - 10.5
10
60823.927010.626010.2842

Nova ACB9

SIZERIM CHOICERIM USEDDIAMETERSECTIONTREAD WIDTHMEASURED ATCIRCUMFERENCE
inchmminchmminchmminchpsiBarmminch
5.0/22.0-134.5-6.55.554921.62037.991656.50201.38172467.8586
6.5/23.0-135.5-6.5657722.722168.511706.7201.38181171.29921

Nova ACB10

SIZERIM CHOICERIM USEDDIAMETERSECTIONTREAD WIDTHMEASURED ATCIRCUMFERENCE
inchmminchmminchmminchpsiBarmminch
6.0/21.0-135.5-6.55.552820.81857.281505.91201.38166065.3453
7.0/22.0-135.5-7.55.555621.920381807.1201.38174868.8189

Nova CR6ZZ

SIZEPATTERN
PERMITTED
RIM WIDTH
DIAMETER
OVERALL WIDTH
TREAD WIDTH
MEASURED AT
inch
mminchmminchmminchpsiBar
165/70R1072H
4.0-5.5
49519.51706.71275302.1
175/70R1382H
4.5-6.0
57922.81807.11355.3302.1
185/70R1386H
4.5-6.0
57922.81917.51455.7302.1
185/70R1488H
4.5-6.0
62524.62017.91455.7302.1
155R1582H
4.0-5.0
635251576.21094.3302.1
295/50R15108V
8.5-10.5
68326.931012.22509.84302.1
275/55R15104V
8.0-10.0
68326.928311.142309.06302.1
215/60R1594V
6.5-7.5
635252228.741776.97302.1
245/60R15101V
7.0-8.5
67726.652519.882208.66302.1
225/65R1599V
6.0-8.0
67726.652329.132017.91302.1
175/70R1586H
4.5-6.0
635251827.151275302.1
185/70R1589H
4.5-6.0
635251877.81355.3302.1
205/70R1596V
5.0-7.0
67726.652118.31686.61302.1
215/70R1598V
5.5-7.0
67726.652258.861927.56302.1

Nova Historic Cut All Weather

SIZERIM CHOICERIM USEDMEASURED AT:DIAMETER:SECTION:TREAD:REVOLUTIONS:CIRCUMFERENCE CALC:
PSIBARMMINCHMMINCHMMINCH/1KM/1 MILEMMINCH
6.2/20.0-135.5-6.56201.3850519.91837.21546.066301013158862.5178
7.0/20.0-136.0-8.07201.3851120.12037.991877.366231003160463.1462
7.2/20.0-136.0-8.08201.3851320.22299.021807.09620998161263.4603
7.5/20.0-136.5-8.58201.3851420.252299.021957.68619996161663.6174
9.0/20.0-138.0-10.010201.385082027110.672339.176271008159662.8320
10.0/20.0-139.0-11.010201.3850319.828211.125910.26331019158062.2037
6.5/21.0-135.5-7.57201.3852120.52299.021656.5611984163664.4028
7.0/21.0-136.0-8.08201.3852320.62299.021827.17608979164464.7170
7.5/21.0-136.5-8.58201.3852120.52168.51877.36611984163664.4028
8.5/21.0-137.5-9.09201.3852820.825910.22158.46602970166065.3453
9.0/21.0-138.0-10.010201.385332127710.912319.09597960167665.9736
7.0/22.0-136.5-8.57.5201.3854921.62218.71756.89580934172467.8586
8.2/22.0-137.0-10.09201.385592225710.122188.58570917175669.1152
9.2/22.0-138.5-10.510201.3856922.428211.12319.09559900178770.3718
10.0/22.0-139.0-12.011201.3856122.130211.8926110.28567913176469.4294
10.5/23.0-139.5-11.511201.3859723.531212.2826110.28533858187573.8276
12.0/23.0-1312.0-14.013201.3858923.236814.4931212.28540869185172.8851
13.0/23.0-1313.0-15.014201.3859123.2538515.1633012.99539867185573.0422
13.0/24.5-1313.0-15.014201.3861724.339415.5131712.48516830193976.3409
15.0/26.0-1315.0-18.016201.3840015.7545117.7638115487783205580.8962
16.2/26.0-1316.0-18.017201.3865525.847618.7441416.3486782205981.0533
8.7/21.5-157.5-9.08302.0756122.12469.692138.39567913176469.4294
9.5/21.5-158.0-10.010302.0755521.8527110.672419.49574923174468.6440
10.0/21.5-158.5-11.010302.0755521.8527910.9825410574923174468.6440
10.7/21.5-159.0-11.010302.0755521.8528711.326910.59574923174468.6440
7.2/23.0-157.0-8.58302.0757922.82168.51877.36550885181971.6285
10.5/23.0-1510.0-12.011302.0759823.5530411.9726110.28532856187973.9847
8.5/23.5-157.0-9.58.5302.0759923.62449.612238.78531855188374.1418
9.1/23.5-158.0-9.58.5302.0759823.552519.882158.46532856187973.9847
11.0/23.5-1510.0-12.011302.0759223.3307091228711.3538866185973.1993
12.5/23.5-1511.0-13.512302.0759223.333813.3132212.68538866185973.1993
9.0/25.0-159.0-11.010302.0762924.7525710.122268.9506815197577.7546
11.0/25.0-1510.0-12.012302.0762724.734513.5828711.3507817197177.5975
13.0/25.0-1511.5-14.014302.0763024.839115.3933513.19505813197977.9117
15.0/26.0-1515.0-17.016302.0765425.7544217.438115487783205580.8962
16.2/26.0-1516.0-18.016302.0765525.845517.9141416.3486782205981.0533
12.5/27.0-1511.5-14.513302.076862738715.2431712.48464747215584.8232
14.0/27.0-1513.0-16.015302.0768827.142416.6935513.98462744216285.1374
16.0/27.0-1515.0-18.016302.0769927.542716.8140816.06456733219486.3940
11.0/23.5-1610.0-12.012302.0759723.531912.5628711.3533858187573.8276
11.0/25.0-1610.0-12.012302.0762924.7533813.3128711.3506815197577.7546
13.5/25.0-1612.014302.076352538615.234013.39501807199578.5400

Dunlop L Section (metal locking valve race tubes available)

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile 
inch
inch
mminchmminchmminch@100mph
500L10CR65
3.5 - 5.5
4.5
49819.61656.51204.71029
450L12CR65
4.0 - 7.0
5
54021.31756.91184.7968
450L13CR65
3.5 - 7.0
5
56022.11676.61154.5915
550L13CR65
4.0 - 7.0
5.5
60823.91997.81285844
550L14CR65
4.0 - 6.5
5.5
63124.81987.81285812
450L15CR48(R6)
3.5 - 6.0
5
609241566.11024841
500L15CR65
4.0 - 7.0
6
63124.81877.41204.7812
550L15CR65
4.0 - 7.0
6.5
65925.920481285777
600L15CR65
5.0 - 7.5
7
68426.92248.81355.3749
650L15CR65
5.5 - 8.0
7.5
70627.82399.41425.6726
700L15CR65
6.5 - 9.0
8.5
70627.826510.41676.6726
600L16CR48(R6)
5.0 - 7.0
6
70827.82017.91224.8724
650L16CR48(R6)
5.5 - 7.5
7
72928.72278.91305.1703

Dunlop M Section (all tubeless)

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread  Width
Revs Per Mile 
inch
inch
mminchmminchmminch@100mph
450M13CR65
4.0 - 7.5
5.5
55221.71726.71244.9928
525M13CR65
5.0 - 8.0
5.5
59023.22108.31485.8868
550M13CR65
6.0 - 9.0
8
60223.72519.91756.9851
550M14CR65
5.5 - 8.0
7
6352522891505.9805
500M15CR65
5.5 - 8.0
7.5
64825.52218.71526791
550M15CR65
6.0 - 8.5
8
660262419.51656.5776
600M15CR65
7.0 - 9.0
8.5
6862727110.71787747
650M15CR65
7.5 - 10.0
9
7112829511.62038720

Dunlop Post Historic (all tubeless)

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile 
inch
inch
mminchmminchmminch@100mph
175/550-13CR65
5.5 - 8.0
8
55521.92319.11726.8923
475/1000-13CR65
5.5 - 8.5
8
59323.32399.41817.1864
475/1150-13CR65
7.0 - 10.0
9
57822.827410.82118.3886
600/1200-13CR65
9.0 - 11.0
10
64025.231212.32399.4800
600/1350-13CR65
11.0 - 14.0
12
6352535113.827410.8807
240/525-13CR65
10.0 - 12.0
11
53120.927410.82349.2967
305/600-13 CR65
12.5 - 14.0
13.5
60723.940215.830512845
475/1000-15CR65
6.0 - 9.0
8
62724.72499.81817.1817
430/1160-15CR82
7.5 - 11.0
9.5
62223.728711.32319.1824
525/1050-15CR65
7.5 - 10.0
8.5
65225.726610.52078786
530/1360-15CR82
12.0 - 13.0
12
65325.734513.628411.2784
530/1500-15CR82
14.0 - 15.5
15
64825.54061632012.6791
530/1600-15CR82
16.0 - 17.0
17
64825.544517.536414.3791

Dunlop Vintage

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile 
inch
inch
mminchmminchmminch@100mph
450-15R5
3.0 - 4.5
4
610241425.6903.5840
500-15R5
3.0 - 5.0
4.5
63024.81736.8963.8824
550-15R5
3.5 - 5.5
5
65525.81807.11074.2768
600-15R5
4.0 - 6.0
5.5
67626.61977.71164.6755
650-15R5
4.5 - 6.5
6
69627.42148.41244.9746
*550-16R5
4.5 - 6.0
5.5
68827.117871064.2745
*600-16R5
4.5 - 6.0
5.5
70827.91987.81214.8723
*650-16R5
4.5 - 6.5
6
73528.92018.31224.8698
550-17R5
4.0 - 6.0
4
71828.11656.5973.8718
*700-17R5
5.0 - 7.0
6
76730.22108.31144.5668
*550/600-18R1
4.0 - 6.5
4.5
76530.11756.91094.3670
*700-18R1
5.0 - 7.0
5
81532.12248.81375.4629
*500-195 STUD
3.0 - 5.0
4
75329.61576.2933.7680
*600-195 STUD
4.0 - 6.0
4.5
787311756.91094.3651
*700-19R1
4.5 - 6.5
5
83732.92248.91305.1612

* Denotes these tyres are Road Legal

DZ03G

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
inch
inch
mminchmminch
195/60R14DZ03G
5.5 - 7.0
6
58823.12068.1
185/55R14DZ03G
5.0 - 6.5
6
558221977.8
195/50R15DZ03G
5.5 - 7.0
6
57522.62028
205/50R15DZ03G
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