Belt Size (Outside dimension): width - 5/8", Length - 154". B151 5L1540 Replaces OEM # for Dixon: 539114557, 114557 Compatible with Dixon: KODIAK 52, RAM ULTRA 52, SPEEDZTR 54 This belt is NOT OEM belt. The OEM number is just for your help in looking for the belt you need! Please check your OEM# and belt size before ordering. If you need our help to find the correct OEM part number for your mower please mail your mower's model/product number. It is generally found under the seat or on the side hood of your mower. NOTE! Wear work gloves to protect your hands when installing this part. 539114557 114557 Drive Belt 5/8 x 154 Compatible with Dixon KODIAK 52, RAM ULTRA 52, SPEEDZTR 54 Lawn Riding Mower