# Bumpers With the announcement of the 2025 FIRST® Robotics Competition Bumper Rule Changes allowing for an increased variety of legal bumper materials. AndyMark has tested a number of different bumper and backer configurations in order to give our best recommendation to the community for the 2025 FRC season. This is just a recommendation on one configuration - you may want to test and adapt this design based on the needs of your team. The test results indicate 2.5” diameter solid noodles (density 2 lb/cu ft) with an EVA tile (density 2.8 lb/cu ft) and plywood backer material provide the best impact dissipation of any accessible material to teams. The diagram below shows a cross-section of these materials. ![](/files/y84Dr7y3SO5CjvqAldD3) For a 32.3” by 27.0” chassis, we used eight [am-5580](http://andymark.com/am-5580) noodles and five [am-2499](http://andymark.com/am-2499) soft tiles. EVA foam floor tiles provide a great harder layer between noodles and the force of impact. The pre-release rules do not indicate if multi-material foams will be allowed, so we recommend positioning the EVA foam as part of the “hard parts” backer. Even if your team only has access to hollow noodles for the upcoming season, we recommend the addition of an EVA foam floor tile to your backer. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.andymark.com/frc-build/bumpers.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.