Unior backs this tool with its Lifetime Warranty against defects in materials and workmanship: if it ever fails through a manufacturing defect it is repaired or replaced free of charge. Normal wear, misuse and modification are not covered. For warranty support, return the tool to Tune Cycles with your proof of purchase and we'll manage the claim with Unior's Australian distributor on your behalf. This warranty is in addition to your rights under the Australian Consumer Law.

• Unior model 1658/2P (article 629230)
• Material: Premium flex plus carbon steel surface finish: trivalent chrome plated according to iso 1456:2009 for hg and ig sprockets how to use the tool: the sprocket wear indicator is used to determine the condition rear sprockets. it can be used to check 12 to 21 tooth sprockets. procedure: the chain is put on the sprocket and the tool placed with its round end between two teeth on the upper sprocket side. the last chain link is moved away from the sprocket and a force of 100 n or 10 kg is applied to the tool in the direction of sprocket rotation. now the last chain link is moved towards the sprocket. if it skips easily to the cog the sprocket is in a good condition and will function flawlessly even with a new chain. however, if the last chain link gets stuck on the tip of the neighbouring tooth or if we have to force it to skip on the cog, the sprocket is worn out and should be replaced. in case the chain falls off the clog when applying force, the sprocket is heavily worn out and a replacement is overdue
• Length: 270 mm
• Width: 13 mm
• Thickness: 43 mm
• Additional length (1): 2.18 mm
• Additional length (2): 11/128" mm
• Weight: 77 g
• Made by Unior, Slovenia — professional bicycle tools since 1919