The Guidering M is e*thirteen's take on the 1x10 single ring way of life. Constructed from hardwearing 7075-T6 aluminum, the M Profile Guidering is optimized for all chainguide systems in order to prevent chain jamming., while the Dual width "M" (narrow/wide) tooth engages the chain securely even at extreme angles to prevent chain drops on even the most unforgiving trails. With its 104 Bolt Center Diameter, this version of the Guidering M will fit up to any 4x104 BCD crankset without inner chainring tabs. The 1mm chainline is swappable with the exception of the 30T ring, as it's threaded to accept chainring bolts.
A great looking quality chainring, but pity there is no warning about the need for longer retaining bolts, as the nut part of the retaining bolt has NOT got receases in the ring for the nut head to sit into. This was used to convert a race face 2 X 10 setup. Hence I only gave it 3 stars.
PROS: Good Quality And Lightwei, Lightweight, Attractive Design
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