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Tyre diameters

Below is a table showing the rolling radius (tyre diameter) of 15", 16", 17", & 18" tyres against the width and aspect ratio.  You may also want to check out a table which shows suitable tyre widths against wheel widths.

Key: Rolling radius for 4th generation Honda Prelude
Good
Even better
Perfect
Although perfect rolling radius, wheel would be too wide to accommodate tyre width.

15" Tyres
Width
(mm)
Aspect
Ratio (%)
Diameter
(mm)
195 35 517.5
205 35 524.5
215 35 531.5
225 35 538.5
235 35 545.5
245 35 552.5
255 35 559.5
 
195 40 537.0
205 40 545.0
215 40 553.0
225 40 561.0
235 40 569.0
245 40 577.0
255 40 585.0
 
195 45 556.5
205 45 565.5
215 45 574.5
225 45 583.5
235 45 592.5
245 45 601.5
255 45 610.5
 
195 50 576.0
205 50 586.0
215 50 596.0
225 50 606.0
235 50 616.0
245 50 626.0
255 50 636.0
 
195 55 595.5
205 55 606.5
215 55 617.5
225 55 628.5
235 55 639.5
245 55 650.5
255 55 661.5
16" Tyres
Width
(mm)
Aspect
Ratio (%)
Diameter
(mm)
195 35 542.9
205 35 549.9
215 35 556.9
225 35 563.9
235 35 570.9
245 35 577.9
255 35 584.9
 
195 40 562.4
205 40 570.4
215 40 578.4
225 40 586.4
235 40 594.4
245 40 602.4
255 40 610.4
 
195 45 581.9
205 45 590.9
215 45 599.9
225 45 608.9
235 45 617.9
245 45 626.9
255 45 635.9
 
195 50 601.4
205 50 611.4
215 50 621.4
225 50 631.4
235 50 641.4
245 50 651.4
255 50 661.4
 
195 55 620.9
205 55 631.9
215 55 642.9
225 55 653.9
235 55 664.9
245 55 675.9
255 55 686.9
17" Tyres
Width
(mm)
Aspect
Ratio (%)
Diameter
(mm)
195 35 568.3
205 35 575.3
215 35 582.3
225 35 589.3
235 35 596.3
245 35 603.3
255 35 610.3
 
195 40 587.8
205 40 595.8
215 40 603.8
225 40 611.8
235 40 619.8
245 40 627.8
255 40 635.8
 
195 45 607.3
205 45 617.3
215 45 625.3
225 45 634.3
235 45 643.3
245 45 652.3
255 45 661.3
 
195 50 626.8
205 50 636.8
215 50 646.8
225 50 656.8
235 50 666.8
245 50 676.8
255 50 686.8
 
195 55 646.3
205 55 657.3
215 55 668.3
225 55 679.3
235 55 690.3
245 55 701.3
255 55 712.3
18" Tyres
Width
(mm)
Aspect
Ratio (%)
Diameter
(mm)
195 35 593.7
205 35 600.7
215 35 607.7
225 35 614.7
235 35 621.7
245 35 628.7
255 35 635.7
 
195 40 613.2
205 40 621.2
215 40 629.2
225 40 637.2
235 40 645.2
245 40 653.2
255 40 661.2
 
195 45 632.7
205 45 641.7
215 45 650.7
225 45 657.7
235 45 668.7
245 45 677.7
255 45 686.7
 
195 50 652.2
205 50 662.2
215 50 672.2
225 50 682.2
235 50 692.2
245 50 702.2
255 50 712.2
 
195 55 671.7
205 55 682.7
215 55 693.7
225 55 704.4
235 55 715.7
245 55 726.7
255 55 737.7
Last updated: 23 Feb 2004 - 7:02pm GMT