4 mm

This highly efficient narrow/wide chainring will grip the chain perfectly, prevent chain drops.We provide 30-42T and Round/Oval as options. Chainring Description: Brand: BUCKLOS Material: 7075-T6 Aluminum alloy,Titanium plating Size: 30T,32T,34T,36T,38T,40T,42T Compatibility: 8,9,10,11 speed chain Bolt Center Diameter: 104mm BCD Thickness: 4mm Shape: Round/Oval Color: Multicolor/Black/Red/Blue/Green/Purple/Gold Round Weight: 38g/32t,about (different size,different weight ) Fit for MTB Bike,XC/Off Road/AM bike modified single chainring. Bolts description: Brand: KRSEC Material: Aluminum alloy,Titanium plating Specification: 6.5mm Weight: 5.4g/pc,approx Color: Multicolor/Black/Red/Blue/Green/Purple/Gold Fit:Single Speed Chainring  Package： 1*Chainring+ 4*Bolts / 1*Chainring / 4*Bolts Sm104BCD Bike Chain Ring Narrow Wide Round Oval 30-42T MTB Chainrings Fit ShimanoThis highly efficient narrow/wide chainring will grip the chain perfectly, prevent chain drops.We provide 30-42T and Round/Oval as options.Chainring Description: Brand: BUCKLOS Material: 7075-T6 Aluminum alloy,Titanium platingSize: 30T,32T,34T,36T,38T,40T,42T Compatibility: 8,9,10,11 speed chain Bolt Center Diameter: 104mm BCD Thickness: 4mm Shape: Round/Oval Color: Multicolor/Black/Red/Blue/Green/Purple/Gold Round Weight: 38g/32t,about (different size,different weight ) Fit for MTB Bike,XC/Off Road/AM bike modified single chainring. Bolts description:Brand: KRSECMaterial: Aluminum alloy,Titanium platingSpecification: 6.5mmWeight: 5.4g/pc,approxColor: Multicolor/Black/Red/Blue/Green/Purple/GoldFit:Single Speed Chainring Package：1*Chainring+ 4*Bolts / 1*Chainring / 4*Bolts Small Tips: 1.This chainring fit for 8/9/10/11 speed chain, fit JIANKUN(IXF) crank and Shimano M370/M410/M610/M670/M780 crank (not fit M7000/M8000/9000). Fit SRAM/FSA/Prowheel 104bcd crank.2.Please make sure your crank BCD specification is 104mm BCD before purchasing.3.Shipment according to your purchase options. PaymentDelivery detailsTerms of salesAbout usContact usPayment• Payment methods accepted: PayPal/ Visa/ Mastercard/ Goole Pay/ American ExpressDelivery details• We'll dispatch the item for you in 1 business day after receiving payment.• We will ship to confirmed order address, your order address must match your shipping address.• All of your order will be checked carefully before pack.• We do not responsible for any custom duty or import tax.Terms of sales • We provide "One year" quality assurance date. if the item is defective within 1 year due to quality issue, we will repair or replace it for free(according the products). please notice, warranty does not include accident, human fault or improper use. Return and Refund Policy• Please contact us within 3 working days and show us as much proofs,photos, etc If what you receive come with a broken or defective quality.• Buyers are responsible for the shipping cost which cause by returns or exchange.• Refund will be granted after we receive the returned items in original condition.• New items or Repaired items will be shipped to you as soon as we receive the items for replacement.About us• We maintain high standards of excellence and strive for 100% customer satisfaction. Positive feedback is very important to us. Please kindly contact us immediately before you leave us Neutral or Negative feedback, we will do our best to keep you satisfied. Contact us• Our working time:BST+8 Monday to Saturday 8:30-18:00. We will reply you within 1 business day.