BB30 is awful
09-20-13, 02:55 PM
#351
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Y'all think stiffness is about speed... interesting.
It's not. It's about many more things but it does not actually affect speed.
One pretty major thing I appreciate in a stiff frame is that the chain is not constantly rubbing the front derailer.
As you know the front derailer needs to be pretty accurately adjusted as not to cause rub. But if you are a big strong fella like me you're going to either get chain throw, chain rub or a bb30, pf30 osbb, bb90 etc.
I once had an ISIS frame where the chain rubbed the derailer both on the inside and outside...
Track frames don't have front derailers. They also have beefier chainrings, thicker chains, dropout adjusted chain tension and a need for a very precise chainline adjustment. Also, what do I know. The beasts riding track might just prefer some flex as a form of natural suspension. They do ride 100% smooth surfaces so their tires must be inflated to near bursting
I have to say, if you want to adjust your chainline then square taper is your method. BB30 handles that pretty badly (still, maybe not always) but then again it's a normal bike bb aka for derailers
It's not. It's about many more things but it does not actually affect speed.
One pretty major thing I appreciate in a stiff frame is that the chain is not constantly rubbing the front derailer.
As you know the front derailer needs to be pretty accurately adjusted as not to cause rub. But if you are a big strong fella like me you're going to either get chain throw, chain rub or a bb30, pf30 osbb, bb90 etc.
I once had an ISIS frame where the chain rubbed the derailer both on the inside and outside...
Track frames don't have front derailers. They also have beefier chainrings, thicker chains, dropout adjusted chain tension and a need for a very precise chainline adjustment. Also, what do I know. The beasts riding track might just prefer some flex as a form of natural suspension. They do ride 100% smooth surfaces so their tires must be inflated to near bursting
I have to say, if you want to adjust your chainline then square taper is your method. BB30 handles that pretty badly (still, maybe not always) but then again it's a normal bike bb aka for derailers
Are you seriously saying that track sprints want a flexy frame? You should go ask in the track racing forum, I'm sure they'll set ya straight as well as have a good laugh at that one.
Stiffness is absolutely about speed. If you're losing wattage (potential speed) because your components are flexing, rather than transferring that power through your drivetrain to your wheels, you aren't going as fast as you could be. It's not the same impact as say, aerodynamics or simply being stronger, but it's definitely about potential energy and speed.
09-20-13, 03:29 PM
#352
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So surely, at page 15, this thread must be all about consensus and kumbaya-singin' brotherhood.
So what's the consensus? Is BB30 awful?
So what's the consensus? Is BB30 awful?
09-20-13, 03:34 PM
#353
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09-20-13, 03:40 PM
#354
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Not much, apparently.
Are you seriously saying that track sprints want a flexy frame? You should go ask in the track racing forum, I'm sure they'll set ya straight as well as have a good laugh at that one.
Stiffness is absolutely about speed. If you're losing wattage (potential speed) because your components are flexing, rather than transferring that power through your drivetrain to your wheels, you aren't going as fast as you could be. It's not the same impact as say, aerodynamics or simply being stronger, but it's definitely about potential energy and speed.
Are you seriously saying that track sprints want a flexy frame? You should go ask in the track racing forum, I'm sure they'll set ya straight as well as have a good laugh at that one.
Stiffness is absolutely about speed. If you're losing wattage (potential speed) because your components are flexing, rather than transferring that power through your drivetrain to your wheels, you aren't going as fast as you could be. It's not the same impact as say, aerodynamics or simply being stronger, but it's definitely about potential energy and speed.
Your passion is overwhelming.
My advice? Smoke a doobie, get on the beach cruiser and go get a taco.
09-20-13, 03:47 PM
#355
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I have been stuck at home pretty much all day with a sick kid, and from the strong start to this thread this morning, I really though it was gonna help keep me occupied, and keep my mind off the beautiful day I was missing out on. But the effort really fell off. I'm disappointed.
09-20-13, 03:50 PM
#356
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I have been stuck at home pretty much all day with a sick kid, and from the strong start to this thread this morning, I really though it was gonna help keep me occupied, and keep my mind off the beautiful day I was missing out on. But the effort really fell off. I'm disappointed.
09-20-13, 03:51 PM
#357
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From what I have seen, a Hollowtech II BB lasts far longer, and works just as well for most road cyclists.
09-20-13, 03:53 PM
#358
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Dude, what're you doing?
Go watch cartoons with your kid. Way more productive than a bunch of desk jocks arguing about stupid bearings and overpriced cranksets.
Go watch cartoons with your kid. Way more productive than a bunch of desk jocks arguing about stupid bearings and overpriced cranksets.
09-20-13, 04:03 PM
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09-20-13, 04:06 PM
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Kid is too sleepy and grumpy for cartoons. Been sitting on the veranda watching the other play for much of the day, but I gotta be honest with ya. Much as I love the kid, there's only so much 4 year old cavorting you can watch til you need some other form of entertainment.
09-20-13, 04:07 PM
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Helmets? I never wear helmets. They are just a conspiracy to get you to spend more money. I have been wearing the same Yoplait cycling cap since 1983, and my head is fine.
09-20-13, 04:14 PM
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09-20-13, 04:33 PM
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I really need to see a picture of this 30 year old hat that has been worn and sweat in over the years. If its true, this beats both threaded bb and bb30 for elegance, longevity and bad assedness.
Last edited by Danielle; 09-20-13 at 04:37 PM.
09-20-13, 04:36 PM
#367
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For servicing, square taper cranks require a crank puller, a splined bottom bracket tool and matching square drive socket (or lockring wrench, pin spanner, and fixed cup wrench), an 8mm hex socket bit, and a torque wrench (and not the same one as you'd use for anything else on a bike). How many bike owners have all those tools?
09-20-13, 04:42 PM
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Why? I have no idea.
I've never had a square taper cartridge bearing BB last very long, but the Shimano ones I've owned we're a flawed design(narrow bearing spacing).
The old Campagnolo ones lasted a long time, but they required regular maintainence, and new bearings, because the seals were a joke.
I've never had a square taper cartridge bearing BB last very long, but the Shimano ones I've owned we're a flawed design(narrow bearing spacing).
The old Campagnolo ones lasted a long time, but they required regular maintainence, and new bearings, because the seals were a joke.
09-20-13, 04:50 PM
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After owning a few bikes with different BB, my conclusion is:
Threaded BB = less chance of screwing up
Pressfit = More chance of screwing up
I never notice any difference in stiffness between the two. I didn't have problems with either one other than compatibility with pressfit. End thread!
Threaded BB = less chance of screwing up
Pressfit = More chance of screwing up
I never notice any difference in stiffness between the two. I didn't have problems with either one other than compatibility with pressfit. End thread!
09-20-13, 04:51 PM
#371
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For servicing, square taper cranks require a crank puller, a splined bottom bracket tool and matching square drive socket (or lockring wrench, pin spanner, and fixed cup wrench), an 8mm hex socket bit, and a torque wrench (and not the same one as you'd use for anything else on a bike). How many bike owners have all those tools?
09-20-13, 04:53 PM
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09-20-13, 05:22 PM
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I think I'll pass on your advice (except maybe the taco, there's a delicious Mexican place 2 blocks from my house) and instead take my BB30-equipped race/training bike (that's never had a single issue all season long) to Oakland Grand Prix on Sunday and try to make the most of my last race for the season. I'm sure the added stiffness will help me place better.
09-20-13, 05:42 PM
#375
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It was a rhetorical question in response (following on to your response) to coasting's post about how a BB30 bottom bracket means taking his bike to the shop for crank service. I'd bet that 99% of cyclists need to take their bike to a shop for crank service because they don't own one or any of the various specialty tools that any variety of bottom bracket requires for service.
That said, I don't even have a BB30 bike but I own the tools to service one by virtue of owning a kit for servicing press fit automotive front wheel drive wheel bearings, which has also been used for installing headset cups.
That said, I don't even have a BB30 bike but I own the tools to service one by virtue of owning a kit for servicing press fit automotive front wheel drive wheel bearings, which has also been used for installing headset cups.