2 Pack Martin Wheel T858 18x850-8 Inner Tube TR13 Straight Valve 18x950-8 by Martin Wheel $38.98 Sold out 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out PRODUCT INFORMATION Type Inner Tube PRODUCT DESCRIPTION Brand New (2) Pack of Martin Wheel Company Inner Tubes… · Inner Tube (2) Pack · Martin Wheel Company Part # T858 · Fits Tire Size 18x850-8 · Also Fits Tire Sizes: 18x950-8 & 20X1000-8 · Valve Stem: TR13 Straight Valve Stem