Important notice on tyre-rim combination...
To achieve optimum riding characteristics with the highest safety levels and to achieve optimum riding characteristics with the highest safety levels, the tyre and rim must fit and function as an integrated system. For clarification on sizing, all Continental bicycle tyres are sized according to the ETRTO (European Tyre and Rim Technical Organisation) format.
The format tyre width in mm (size B) x tyre b as diameter in mm (size D), for example 23-622, is indicated on the tyre side in the tyre base area.
Alternative designations, such as 700 x 23C or 29 x 2.0, do not give a clear information about the necessary rim size.
1. Always observe the internationally harmonised ETRTO standard and combine tyres and tubes appropriately
2. Always observe the permissible maximum pressure on the side(sidewall) of the tyre.
Continental recommends that you mount bicycle tyres on hook edge type rims, unless stated otherwise (eg GP5000S TR tyres are also compatible with hookless rims). Hook edge type rims provide a more secure hold, especially with air pressures exceeding 44 PSI (3 bar). These advantages are safety-relevant. From 73 PSI (5 bar) onwards, the hook edge type rims are even stipulated by the ETRTO guideline. The only tyre in the Continental portfolio that is compatible with hookless rims, GP5000S TR, must not be inflated over 73psi (see chart below).
This rim type, for example 622 x 13C, is indicated with a rim base diameter in mm (sizeD), the rim width in mm (size A) and a “C” for crotchet (Illustration 6 ).If the size information on older rims is no longer legible, the rim width can simply be measured by using a calliper from one hook edge to the other. An overview listing the appropriate rim width for every tyre size is also available from ETRTO (also look at the chart below).
Non-matching tyre-rim combinations can result in a sudden tube failure or make the non-matching tyre-rim combinations can result in a sudden tube failure or make the tyre jump off the rim. Risk of accident with unforeseeable consequences.