Single Chainring Bicycle Crank Arm Set 52/42T 170Mm 130Bcd Crankset Sq\. Taper Product Features Aluminum Alloy ?SIZE? BCD: 130mm, Crank Arm length: 170mm, Chainring?3/32" 52T)?compatible with 9/16" pedals, chain size 1/2"*1/8", chain line 45mm, B.B.Axle recommended 118mm. External width between chain guard is 15.4mm (0.6in), total diameter of chain guard is 226mm (8.9in). ?MATERIAL?This crank set is made of forged aluminum alloy 6061-T6 and 3mm alloy chainring, which is of high strength and durable, weight is approx 725g/1.60lb. ?NEW DESIGN?Our crankset has high strength, can be used for a long time. Light weight design, adding no heaviness to you bike, make riding more comfortable and relaxing. Double alloy chainring cover, avoid chain rubbing riders pants, prefect for daily commuting. ?COMPATIBILITY?Easy Installation?A good replacement for bike repair, compatible with city folding bike. Check Frame chain stay clearance before purchase. ?PACKAGE INCLUDE?Complete set including left crankarm, right crankarm and chainring?52T, replaceable? and double Chainguard (alloy). Please measure the size to confirm it fit your bike before you order. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!