Originally Posted by
rpenmanparker
Could you please translate your question into English? What does blocking out gears mean? What does pass roll out mean? Glad to help If I could figure out what you are talking about.
Robert
For junior racers, our bicycles can only have so large a gear, which is dictated by the rollout distance, or the distance a bicycle will roll backwards in one full revolution of the cranks. That distance happens to be 7.93 meters, or the approximate equivalent of 52x14.
To do that, one can a)Buy a junior cassette, which has a 14t as the smallest gear, or b) adjust your derailleur using the limit screws to make it so your chain will only shift as high as the 14t cog on your standard cassette.
To the OP, We have a juniors specific forum under the "Racers" Heading, which is full of helpful juniors scared of venturing into the scary world of the 41, and seriously helpful adults who know what roll-out and blocking gears means, no offense Robert.