Tire Combinations - 6110M

IMPORTANT: Avoid excessive power train wear. Do not mix worn and new tires, bias and radial, or tires of different diameters. Do not use R2 tires in combination with R1.

Available tires are grouped by rolling circumference index. Rolling circumference is the distance covered by the tire in one revolution. Tires within a group, regardless of rim size, are the same or nearly the same height. Knowledge and understanding of the rolling circumference index and group size make it easier to select suitable tire combinations for the front and rear wheels.

The rolling circumference index is an important factor for correctly setting up the tractor. Since front tires are smaller than rear tires, front tires have to rotate faster to cover the same distance as the rear. Therefore it is important to select the correct size to optimize efficiency and ensure longer tire life.

The front tire must be from a group that is five group sizes smaller than the rear tire group. Example: if the rear tires are from Group 47, the front tires must be from Group 42. Rim size is irrelevant. Tires with different rim sizes such as 18.4R46 and 20.8R42 belong to the Group with the same rolling circumference, in this case 47. Tire sizes are stated in the tables below.

If you have any questions or need assistance in choosing correct combinations, see your authorized dealer.

IMPORTANT: If the tire combination or tire manufacturer is changed, the transmission ratio must be ascertained. See Calculate Tire Combination.

IMPORTANT: If the transmission ratio is to be changed, the following jobs must be performed by your authorized dealer:

• Change the gear pair for the front-wheel drive axle output.
• Change tire size in the software of the control units
• Replace oil sight-glass

FRONT TIRES
	Minimum Recommended Row Width mm (in.)
	762 (30)	812.8 (32)	1016 (40)+
	Tire width mm (in.)
Group size	420 (16.9)	480 (18.4)	520 (20.8)	620 (23.1)
43	420/85R34	480/70R34	540/65R34	—
42	16.9R30 420/90R30	480/70R30	540/65R30	600/65R28

REAR TIRES
	Minimum Recommended Row Width mm (in.)
	762 (30)	812.8 (32)	1016 (40)+
	Tire width mm (in.)
Group size	480 (18.4)	520 (20.8)	620 (24.5)	710 (28)
48	480/80R50	520/85R46	650/85R38	710/70R42
47	480/80R46	520/85R42	620/70R42	710/70R38

Tire combinations on tractors without front-wheel drive axles
Rear Wheel			Front Wheel
Size	SRI	Load index	Size	SRI	Load index
16.9-24 -R3	625	6PR	10.5/80-18 -R4	425	10PR
			11L-15 -F3	390	8PR
			27/9.5-15 -I1	330	6PR
340/85R38	750	133A8/B 133D	10.00-16 -F2	425	10PR
13.6R38		128A8
420/85R24	625	137A8 137D	10.5/80-18 -R4	425	10PR
16.9R24		134A8
420/85R30	700	140A8/B 140D	11L-15 -F3	390	8PR
16.9R30		137A8 141A8/B 144A8
420/85R34	750	142A8/B 142D 147A8/B	10.00-16 -F2	425	10PR
			11L-15 -F3	390	8PR
16.9R34		139A8
420/85R38	800	144A8/B	10.00-16 -F2	425	10PR
16.9R38		141A8
460/85R30	725	145A8/B 145D	10.00-16 -F2	425	10PR
			11L-15 -F3	390	8PR
18.4R30		142A8
460/85R34	775	147A8/B 147D	10.00-16 -F2	425	10PR
18.4R34		144A8
460/85R38	825	149A8/B 149D	11.00-16 -F2	450	12PR
18.4R38		146A8/B 141A8	10.00-16 -F2	425	10PR

Tire combinations on tractors with front-wheel drive axles
Rear Wheel			Front Wheel
Size	SRI	Load index	Size	SRI	Load index
13.6-46 -R2	875	6PR	13.6-38 -R2	775	6PR
230/95R48	800	136D	230/95R32	600	128D
270/95R48	825	144A8	270/80R36	650	134A8
300/95R46	825	158A2	270/95R32	625	146A2
320/90R42	800	139A8	320/85R28	600	124A8 124D
			12.4R28		121A8
320/90R50	875	147A8	320/85R34 -R1	675	133A8
340/85R38	750	133A8/B 133D	280/85R28	575	118A8/B 118D
13.6R38		128A8	11.2R28		116A8
			340/85R24	575	130A8/B
			13.6R24		121A8
340/85R46	825	150A8/B	320/85R32	650	126A8 142A8/B
340/90R48	875	152A8	340/85R38	750	133A8 133D
380/80R38	750	142A8/B	320/85R28	600	124A8/B
			12.4R28		121A8
			340/85R24	575	125A8 125D
			13.6R24		121A8 128A8
380/90R46	875	149A8	320/85R34 -R1	675	133A8
			380/85R30	675	135A8 135D
420/85R30	700	140A8/B 140D	320/85R24	550	122A8/B 122D
16.9R30		137A8 141A8/B 144A8	12.4R24		119A8
420/85R34	750	142A8/B 142D 147A8/B	340/85R24	575	130A8/B 125A8/B 125D
16.9R34		139A8	13.6R24		121A8
420/85R38	800	144A8/B	340/85R28	625	127A8/B 127D
			13.6R28		123A8
			320/85R28	600	124A8/B 124D
16.9R38		141A8
			12.4R28		121A8
			380/85R24	600	131A8/B 131D
			14.9R24		126A8
460/85R30	725	145A8/B 145D	340/85R24	575	130A8/B
			13.6R24		121A8
			320/85R24	550	122A8/B
18.4R30		142A8	12.4R24		119A8
460/85R34	775	147A8/B 147D	380/85R24	600	131A8/B 131D
18.4R34		144A8	14.9R24		126A8
			340/85R24	575	130A8/B 125A8/B 125D
			13.6R24		121A8
460/85R38	825	149A8/B 149D	380/85R28	650	133A8/B 133D
			14.9R28		128A8
			420/70R28	650	133A8/B 133D
			340/85R28	625	127A8/B 127D
18.4R38		146A8/B 141A8
			13.6R28		123A8
			420/85R24	625	137A8/B 137D
			16.9R24		134A8
			380/85R24	600	131A8/B
			14.9R24		126A8
480/70R34	750	143A8/B 146A8 155A8 143D	380/70R24	575	125A8/B 125D
480/70R38	800	145A8/B 145D	380/70R28	625	127A8/B 127D
			420/70R24	600	130A8/B 130D
480/80R30 -R4	725	157D	420/65R24 -R4	550	146D
480/80R34 -R4	775	159D	400/80R24 -R4	600	144D
480/80R38 -R4	825	161D 149A8	400/80R28 -R4	650	146D
			440/80R24 -R4	625	149D
520/70R34	775	148A8/B 148D	420/70R24	600	130A8/B 130D
520/70R38	825	150A8/B 150D	420/70R28	650	139A8/B 133D
			380/70R28	625	127A8 127D
			480/70R24	625	138A8/B 138D
			420/70R24	600	130A8/B 130D
540/65R34	750	147A8/B 152D 147D	440/65R24	575	128A8/B 135D 128D
540/65R38	800	147A8/B 153D 145D 147D	480/65R24	600	133A8/B 140D 133D
600/65R38	825	153A8/B 153D 159D 151D	480/65R28	650	136A8/B 136D 142D
			540/65R24	625	146A8 140D 149D