SOURCE-LINKED REGULATION GUIDE
UN R109 — Retreaded commercial-vehicle tyres
Examine production requirements for retreaded tyres used on commercial vehicles.
Explore the scopeWhat does it cover?
UN R109 governs production of retreaded pneumatic tyres intended mainly for categories M2, M3, N, O3 and O4. The speed category and the original tyre’s markings and approval status limit its scope. The tyre’s earlier identity therefore matters when assessing a retread.
Who is it for?
Commercial-vehicle tyre retreaders and production or testing teams.
Which subjects are addressed?
- Commercial-vehicle tyre retreading
- Vehicle categories covered
- Speed and load markings
- Link to original R54 type approval
Common question
Does approval of the original tyre matter?
Yes. The scope excludes production from tyres that did not originally have R54 type approval. The speed symbol and load index are also part of the scope assessment.
Source documents and references
Work with this regulation in RegsUP.
Read the text with its edition and sources. Assess available comparisons, relevant dates and question-and-answer features against your work needs.
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