Sonic Shift Rings - 120BCD 4 Bolt Double set - SRAM XX

£29.99 was £64.99
Plenty in stock

Shout about this product!


The sonic range of precision 3D CNC machined shifting chainrings are a premium upgrade to your drivetrain. Higher quality, lighter weight and superior performance to original fitment rings, invest in a performance improvement. Our UK facility is flat out making the popular narrow-wide type single rings so we teamed up with an expert manufacturer in Germany to produce a range of the finest quality rings for customers running shifting setups. Check out our range of models and ratios to perfect your gearing setup.

With the huge range of BCD options in the market currently please check your requirements before ordering. We have a list in the TECH section on the next tab to help. This double set of chainrings is a common mountian bike crankset size for lots of double cranksets like SRAM XX, this set includes the following parts:

36/38 Tooth Outer Ring - 120BCD (M10 Threaded Bolts for direct mount included)
24/25T Granny Ring - 80BCD

For optimum performance we recommend replacing chain and cassette at the same time to match the wear across all components. Different amounts of wear will cause jumping and mis-shifting.

Precision machined profiles ensure slick shifting and help evacuate mud for all weather performance. CNC machined customer stainless steel shift pins located at strategic positions shift between rings at low torque sections of the pedal stroke to increase drivetrain life and accuracy of shifting performance. Type 2 anodising in deep gloss black for durability and classy good looks.

Compatible with all 9, 10 or 11 speed chains, these chainrings are designed and CNC machined from 7075 T6 aluminium by our aerospace manufacturing partner in Germany. By manufacturing products with the highest quality machinery, we can offer market leading quality for amazing value.

Weight: g



    Ultra lightweight components suitable for cross country racing only.


    Lightweight parts suitable for off-road cross country riding.


    Tough light to mid-weight components designed for off-road trail riding.


    Sturdy components suitable for long off-road descents.

Tech Specs

What PCD do I require?

PCD is the diameter of the bolt pattern, and you need to match this with your crankset dimensions. There are lots of different standards, so either measure or contact the crank manufacturer for information. Here is a brief list of common sizes:

64 BCD x4 - Common 4 bolt inner ring
76 BCD x4 Non-symetric pattern M8.5 Thread - SRAM XX1
88 BCD x4 - XTR M985
94 BCD x4 - SRAM X01, X1 and GX
96 BCD x4 M8 thread - Some Shimano Triple
96 BCD x4 Non-symetric pattern - New Shimano XT M8000
96 BCD x4 Non-symetric pattern M7 thread - New Shimano XTR M9000 M9020
102 BCD x4 - XTR M960
104 BCD x4 - Common 4 bolt mountain bike size
110 BCD x5 - Road Compact
120 BCD x4 - some SRAM double cranks
130 BCD x5 - Road Standard
144 BCD x5 - Track Rings
Various direct mount spline types as well

So please check suitability before ordering. We only manufacture the most common sizes currently, but are adding to the range constantly as they become available

Please note: These chainrings are designed specifically for shifting set-up only. They do not work in single ring set-ups.