This spider is for use on RS7 Square Taper Cranks that require a single chainring. Part code is SP-SQ-104-50MM-X1 plus colour choice
4 arm 104 BCD spider machined from 7075 T6 areospace aluminium for maximum strength. These spiders will accept chainrings of 90mm ID fitting.
Chainline is standard 50mm for mountain bikes and gravel bikes using square taper bottom bracket of the length required for the frame. This can be adjusted for Rohloff 54mm by changing the BB axle width easily. These also fit RO1 cranks and will give the same chain line as RS7’s as it is the spider that dictates the chain line not the cranks.
Available in anodised black or polished silver
IMPORTANT – The interface on ALL Middleburn spiders is the same and so you can fit ANY spider onto any cranks BUT fitting X Type spiders onto SQ Taper Cranks or vice versa will have an effect on the chain line and change it from it’s designed specification. If you are doubt what spider can be used on which type of cranks please email us and we can help.