Chainline Spacers – 1x / Single Ring

For most 1X chainrings (not direct mount)
Adjusts Chain Line For Better Efficiency and Retention
Sold individually and in sets of 4 or 5 spacers.

Use with Standard Chainring Bolts for Mountain Bikes or for Road & CX Bikes.

Order 1 set for typical Chainring Conversion.
– See Notes Below for Compatibility.

$ 1.75$ 7.50


Adjusting Chainline:

When mounting 1X chainrings (non-direct mount), sometimes a minor adjustment for position and chainline can benefit your drivetrain.  For this, we carry these Chainline Spacers which allow a simple chainring offset to accommodate the bicycle chain line.  Use these for Mountain, Road and Cyclocross as needed.

Mounting is easy:  Simply remove the chainring, then put it back on with spacers between the crank and the chainring.  Check out the photos for examples.



Chainline Spacers:

– Order spacers in sets of 4 or 5 as needed, above.
– CNC Aluminum
– Black Gloss Anodize
– 2.5 mm thick
– Fit for 10 mm diameter Chainring Bolts
– Weight:  Approximately 0.6 gram each.


– Use with Standard Length Chainring Bolts like these Mountain Sets or these Road/CX Sets
– Fits Most 4-Bolt and 5-Bolt Cranks (not for direct mount chainrings).
– For Road, Mountain and Cyclocross applications.
– Can be used for single ring or single-speed and for 1X Conversions.

– Use with WickWerks Mountain Z-Rings – Single Front Chainrings
– Use with WickWerks Cyclocross Z-Rings – Single Front Chainrings
– May be used with Bash Guards, but MUST USE extra long chainring bolts (not available at

– Not for use with shorty chainring bolts.
– Not for use with 120/80 BCD Mountain 2×10 cranks.
– Not for use with double or triple chainrings.


Chainline Spacers Applications:

Not all bikes or all 1X Conversions need chainline spacers. However, there are several situations where a minor adjustment to the chain line can be quite beneficial. Here are some examples:

  • Examine the position of the chainring with respect to the cassette. If the center(ish) cassette cog aligns to the inside of the chainring, you may benefit from using the spacers.
  • Another way of looking at it . . . . Put the chain in the biggest cassette cog and examine the angle of the chain going up to the chainring, then put the chain in the smallest cassette cog and compare that angle to the chainring. If the angle appears to be greater when in the big cassette cog, then using the chainline spacers to will help the overall tracking.
  • If you spend most of your time riding in the bigger cassette cogs, using the spacers will help with drivetrain efficiency. (A more straight chain line gives more of your pedal power to the ground — less energy goes into wearing out your chain and gears.)
  • If you have chain drop issues in rough terrain when riding in the biggest cassette cogs, you may benefit from a minor adjustment of the chain line inward. Use these chainline spacers to accomplish it.

Chainline spacers won’t solve all the issues with 1X rings, but they can really help with some. It seems a little funny that a minor adjustment of just 2.5 mm can make things run better, but, as with many drive train things, just a tiny adjustment can make a world of difference. If you want your bike running as efficient as possible, examine the chain alignment and see if you might benefit from spacing the 1X ring inward just a touch.