Racer Tech Thread
#4429
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DA RD-9100 questions:
Will it work with the 9000 system?
Will it work with the 9000 wires, but all new 9100 parts?
Anyone know what size pulleys the new Rear Derailleur will take?
I'm wanting to use these 13T pulleys.
Edit Update: Got this answer...
"Each individual R9150 component is 100% compatible with 9070 as well as 6870 Ultegra Di2.
Don’t know about pulley cages. I rode the Ceramic Speed 17T for 1500 miles then index shifting deteriorated badly. I would stick with the pulleys it has. Max you can save is 1 watt with 13T."
Will it work with the 9000 system?
Will it work with the 9000 wires, but all new 9100 parts?
Anyone know what size pulleys the new Rear Derailleur will take?
I'm wanting to use these 13T pulleys.
Edit Update: Got this answer...
"Each individual R9150 component is 100% compatible with 9070 as well as 6870 Ultegra Di2.
Don’t know about pulley cages. I rode the Ceramic Speed 17T for 1500 miles then index shifting deteriorated badly. I would stick with the pulleys it has. Max you can save is 1 watt with 13T."
Last edited by Doge; 12-20-16 at 09:57 PM.
#4431
Senior Member
It's pretty common at local crits for riders (non-teammates) not competing to offer up wheels. Was wondering if this applies to all USAC road events so looked it up.
3B8. Support. When not otherwise prohibited, competitors
may exchange food and drink among themselves. Tires, tools,
pumps, wheels, and bicycles may be exchanged only among
members of the same team and a rider may not sacrifice
himself for another rider unless on the same team.
Perhaps what it really means is "may not be exchanged by competitors"
3B8. Support. When not otherwise prohibited, competitors
may exchange food and drink among themselves. Tires, tools,
pumps, wheels, and bicycles may be exchanged only among
members of the same team and a rider may not sacrifice
himself for another rider unless on the same team.
Perhaps what it really means is "may not be exchanged by competitors"
#4432
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Join Date: Jan 2014
Location: Southern California, USA
Posts: 10,499
Bikes: 1979 Raleigh Team 753
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It's pretty common at local crits for riders (non-teammates) not competing to offer up wheels. Was wondering if this applies to all USAC road events so looked it up.
3B8. Support. When not otherwise prohibited, competitors
may exchange food and drink among themselves. Tires, tools,
pumps, wheels, and bicycles may be exchanged only among
members of the same team and a rider may not sacrifice
himself for another rider unless on the same team.
Perhaps what it really means is "may not be exchanged by competitors"
3B8. Support. When not otherwise prohibited, competitors
may exchange food and drink among themselves. Tires, tools,
pumps, wheels, and bicycles may be exchanged only among
members of the same team and a rider may not sacrifice
himself for another rider unless on the same team.
Perhaps what it really means is "may not be exchanged by competitors"
Those on the sideline - non competitors may not help from start to finish. Before the start - they may help. "Team" also includes team support. So car and feed are OK. Some race bibles say team feed support must wear team jerseys.
It comes up sometimes when a feel good story about a spectator bike being loaned to a rider who has a mechanical. It is totally ignored in Paris Roubaix where there are thousands of spectators with spare wheels.
Last edited by Doge; 12-20-16 at 06:45 PM.
#4433
Ninny
A non teammate who wasn't even in the race gave me a wheel at the state crit last year. The official, who was being very letter-of-the-law in general (wouldn't let me even talk to the pit guy until he entered my number on his sheet), was right there for the whole "I didn't put a wheel in," "here use mine," handing the wheel over the barrier into the pit conversation. I'd be surprised if any official wouldn't have done the same.
#4435
A non teammate who wasn't even in the race gave me a wheel at the state crit last year. The official, who was being very letter-of-the-law in general (wouldn't let me even talk to the pit guy until he entered my number on his sheet), was right there for the whole "I didn't put a wheel in," "here use mine," handing the wheel over the barrier into the pit conversation. I'd be surprised if any official wouldn't have done the same.
Some amateurs aren't on teams or they can't afford a second set of wheels, but a friend or other kindly racer is happy to loan them one in a pinch. Enforcing this rule against amateurs, especially in the lower categories, only hurts the sport.
As for the pro riding the bike given to him by a spectator earlier, yeah, that technically broke the rules. But we already discussed it months ago when it happened, and most agreed it was a funny story and the guy received no real competitive advantage from it. So, let's make an exception in this case.
This gets back to Doge's obsession with the rule book and whether all rules are being applied equally and equitably all the time, while at the same time, he is doing everything he can to push the rules to their limits.
Last edited by topflightpro; 12-21-16 at 08:54 AM.
#4436
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I agree with [MENTION=92828]topflightpro[/MENTION] on application. As I posted over a year ago, it is left to the official. The "rules are rules" line has a pile of exceptions. They are not applied equally, at least, and application varies by location and level and I'm fine with that.
What seems like pushing a rule to its limit may be more the variation of what is allowed under different rules and venues. A traveling junior can have huge swings in what is allowed. A totally fine bike on Wed may be an illegal one on Sunday. I enjoy the technical nuances. In rules, in equipment etc.
What seems like pushing a rule to its limit may be more the variation of what is allowed under different rules and venues. A traveling junior can have huge swings in what is allowed. A totally fine bike on Wed may be an illegal one on Sunday. I enjoy the technical nuances. In rules, in equipment etc.
#4440
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When I am working the pit at a criterium with no neutral or mechanic I ask the riders to label their wheels with their team name as well as theirs. This helps prevent a rider with no wheels in the pit from grabbing any wheel for service. That's the intent of the rule in amateur racing from my point of view. If a rider puts equipment in the pit it damn site better be there if they need it. If a rider withdraws and their wheels are in the pit, and offers them to anyone, so be it. I'll allow that all day long. I'm recording who is taking service so there is a record.
When there are pros with mechanics in the pit I have to be strict as they are very finicky about their equipment.
When there are pros with mechanics in the pit I have to be strict as they are very finicky about their equipment.
#4441
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Do any Specialized owners on the board experience issues with their seatpost's seat adjustment/retaining bolt? It's always been finicky for me, and the recommended torque specs don't hold the seat in place all that well at all. A couple of days ago I hit a pretty large bump which caused the seat to point nose down, and since then no matter how much I tighten the bolt the seat seems to nose back downward. Even easy spinning on the trainer tonight. I'm hoping it isn't smoked, maybe I could try some blue loctite or something?
#4450
Senior Member