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Shim Measurement 101

There are multiple variables that can create error in shim measurement:

  1. Excessive torque applied to the calipers/micrometer when measuring shims.
  2. Equipment that hasn’t been calibrated or doesn’t offer an accuracy similar to those used at Desmo Times.
  3. Dirty Shims
  4. Different closer shim tools used than what we sell.
  5. Inattention when recording shim sizes

All of the above can create a discrepancy as much as .05mm between measurements taken of the same shim by 2 different people. Realize that we’re measuring things down to thicknesses finer than human hair. Follow the guidelines in our Maintenance Guides for measuring your shims. If concerned, order one size larger and one size smaller to compensate for instrumentation differences between what you have and what Desmo Times uses.

The Bottom Line

EVERY shim at Desmo Times is measured prior to packing with finely calibrated instruments. Additionally, our micrometer and calipers are routinely verified against a known thickness gauge. If our measurements differ from your measurements we will attempt to remedy by offering to swap out shims, but we don’t pay for return shipping and we won’t get into a back-and-forth argument about whose measurements are better. Again, if you want to avoid any possible delays to your service, order either a full shim kit or shims .05 larger and .05 smaller than what your measurements are.

NOTE 1: OEM Ducati shims with markings on the sides may or may not be accurate depending on who measured them or whether they’ve been sanded or lapped. Desmo Times relies on instruments, not markings.