Shimano has issued a recall for certain batches of Pro Vibe alloy stems sold since May 2020. Owners are advised to stop using them immediately and complete an identification procedure to check if their stem is one from an affected batch.
According to Pro, no other stems, including the Vibe Carbon stem, are affected by this issue.
The affected stems can develop corrosion-based cracks at the clamping area of the fork steerer tube, which could lead to the component’s catastrophic failure.
Owners of the affected stems are advised to contact the dealer from whom the stem was originally purchased and return it. Dealers will then provide a replacement stem, depending on availability, or offer a refund.
For further information and dealer contact details visit Pro’s recall page.
The affected products are detailed below.
Shimano has released a flow diagram as a visual aid to guide users through the mandatory identification procedure, included below, but for the sake of clarity, a written version of the procedure is provided too.