Hello everyone. We’re going to race for the first time this Saturday, and we have to adjust the gear properly. Unfortunately, now there is no money to buy a new cassette, so you have to block out the gear. The question is…
It uses a 50-tooth compact crank and 12-27 cassettes (bicycle standard equipment). How many gear stages do I need to block out to go through the rollout?
Is 50x13 OK?
What about 50x14?
Thank you very much.
Can you translate your question into English? What does it mean to “block the gear”? What does “path rollout” mean? If you can understand what is being said, we will be happy to help you.
Sorry to trouble you, but can you translate your question into English? What does blocking out gears mean? What does pass roll out mean? I hope I can be of help to you. If you can understand what is being said.
you have to roll a 50x14. 50x13 will fail the rollout.
For junior racers, the maximum gear size is determined by the roll-out distance (the distance at which the bike retreats with one revolution of the crank). This distance is equivalent to 7.93 meters, or 52 × 14.
This can be accomplished by: a) purchasing a junior cassette with a minimum gear count of 14t, or b) adjusting the derailleur with a limit screw to prevent the chain from shifting to a gear higher than the standard cassette’s 14t sprocket.
To Post: This site has a junior forum in the Racers category. There are many junior riders who are afraid to step into the unknown world of 41T and very informative adult users who understand the meaning of rollouts and block gear.
And teach them to spin, which is rather a side effect, the basis of this rule is, as mentioned above, to protect the knee.
Another reason highlighted during the referee seminars I attended was to unify the effects of different degrees of maturity. The idea is to lower the top gear, transfer the load to a aerobic system, and limit the usefulness of pure power. Based on the upper limit of gear limits, the muscular 16-year-olds (200 pounds) and the lean 16-year-olds (100 pounds) should be able to perform closer, including at maximum speed.
Remember that a good junior player can follow and beat a category 1-2 racer even in a junior gear ratio. We know that top junior athletes can reach an average of 30 miles per hour (about 48km/h) in time trials. It’s not that you can’t run fast, it’s just that it’s harder to run fast.
In New England, the gear limit is strictly enforced. One junior has claimed to use senior gear in one race and junior gear in another. Naturally, he was disqualified in the “Senior Gear Use” race.
Given the lax regulations, I don’t recommend breaking the rules on a daily basis. It’s really the worst thing to have a good race, but a failed roll-out will wipe out the record. There are also cases that have actually been seen. Even the state time trial winner has been disqualified from roll-out in one year. One coach (a Category A referee) had to disqualify a Nationals champion rider for failure to roll out. In my first race, the National Criterium Championship that year, the junior race winner was disqualified due to a failed rollout.
Other bad examples that indirectly encourage riders to violate the rules…
It’s okay to exclude other riders. Whether you intentionally crash the entire group in a training race or not, and you don’t object to the official suspension request, you won’t lose your race time. Rather, I can promote my stage race
Doping is no problem. I’ve never even seen a national election. Take as much testosterone/EPO/HGH as you like
“It’s okay to ignore the stop sign in our town, I’ve never seen anyone policed.”
That’s interesting. In the UK, even small local junior and youth races have introduced gear regulations. I think this is a good thing. First and foremost, it protects children from overly competitive parents. Believe it or not, I’ve actually seen parents put their kids’ bikes through gear checks, pass them, and then sneak away to try to re-adjust the gear and give the little John or Jane a boost. It is far from a model for parents…Not to mention the child’s knee.
I’ve never seen a 50x13 gear ratio work on a bike. All those who have tried have failed. However, most people don’t run on worn tires (I once saw three men fail at this gear ratio at the same time. We all thought we could go now.) The very idea of junior gear protecting your knees is absurd (if someone keeps riding at 53/11 all day, they’ll be left in a moment if they don’t turn 90 rpm or more). But it’s the rules, so you have to follow them. The only real issue is when you’re doing a super fast sprint. Junior jumps at 130-145 rpm and peaks at 160 rpm, while adults can jump at 110 rpm and peak, shift and repeat at 120 rpm.
In Ohio, I’ve never been asked to roll out, but elsewhere, I’m always asked to do so the moment the race ends. In one race in Ohio, one junior was forced to roll out the rest of the weekend after another junior made a fuss about the 53/15 and 52/14 gear not being used. I didn’t care. I won over all the other junior players, so even if someone chooses to use big gear (especially if they are not strong enough to use it correctly), I don’t know why I have to worry.
Yes, I’m surprised it worked. It worked well if I measured it and tested it in the front aisle, and I wasn’t sure, so I had my parents check it out. I’ve tried two times this season on the official level and both passed, so maybe my bike is just a bit different.