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Old 12-04-19, 05:10 AM
  #5701  
tobukog
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Originally Posted by gycho77 View Post
is that an old Araya track disck wheel?
Old Araya discs are about 850g.
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Old 12-04-19, 10:00 AM
  #5702  
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Originally Posted by Baby Puke View Post
You can order these directly from Profile. They come in a number of styles and are very cheap. I couldn't find them listed anywhere a few years ago, so I emailed Profile. Super helpful people.
Thanks. I did order a pair. I also found a guy on eBay selling 3d printed aero plugs for the base bar.
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Old 12-04-19, 10:07 AM
  #5703  
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Originally Posted by carleton View Post
Yeah, my DA 7600 hubs were nice when new. But, they require maintenance and tuning after a couple of years. When they get a lot of miles on them or the grip nuts get mashed-down, the tolerances get wonky and you'll have a number of issues.

For worry-free use, use sealed hubs, as topflightpro suggests.
Yes! I bought them used from NJS Export and the cones were mildly pitted. Just get a hub that uses sealed bearings... It's less of a headache.
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Old 12-05-19, 04:22 PM
  #5704  
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What's the difference between the Origin and Science Track SRM Power Meters? I use a Power Control 7 computer.
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Old 12-06-19, 05:04 AM
  #5705  
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Originally Posted by AmahlAmahlAmahl View Post
What's the difference between the Origin and Science Track SRM Power Meters? I use a Power Control 7 computer.
The main stuff
- Available Crankarm lengths (more "arms" on the science and you can buy shorter arms, but you get the look style adjustable 170/172/175 on the origin)
- Different Bottom Bracket Standard
- +/- 1% accuracy on the Origin vs. .5% Science
- Maybe the biggest, you can recharge the Origin, vs having to send the science off to SRM to have the battery changed (or hacking / soldering a new battery in yourself)

If the crankarm length and Q-factor will work with the Origin, it's a lot easier to live with vs. the Science.

*Something random I noticed perusing SRM's site lately is that they now offer a "rechargeable battery" upgrade to existing SRM's, including the track models. A bit pricey, but so is shipping your SRM off every year or so.
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Old 12-06-19, 08:40 AM
  #5706  
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I sent one of my SRMs in a couple weeks ago for a new battery. They offered to switch me to rechargable for $450. I opted to just go with the batter replacement and leave it as is.
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Old 12-14-19, 08:13 AM
  #5707  
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This reminds me I need to send my BSA BB SRM (original type with the replaceable arms held on with 3 little bolts) for battery change.
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Old 12-15-19, 03:17 PM
  #5708  
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Originally Posted by topflightpro View Post
I sent one of my SRMs in a couple weeks ago for a new battery. They offered to switch me to rechargable for $450. I opted to just go with the batter replacement and leave it as is.
They tried to get me to upgrade to PC8 also. Just went with the battery replacements as well.
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Old 01-03-20, 11:52 AM
  #5709  
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Anyone ever tried to diy "coat" your rings/cogs? A la Atomic Coating

I was thinking some gun/automotive ceramic coatings would work (Cerakote,etc?) anyone ever tried?
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Old 01-05-20, 04:53 AM
  #5710  
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Bought Dura Ace Cog but not Dura Ace lockring.

Any ordinary lockring should be fine? or there anything I should note.
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Old 01-05-20, 01:50 PM
  #5711  
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Originally Posted by Altimis View Post
Bought Dura Ace Cog but not Dura Ace lockring.

Any ordinary lockring should be fine? or there anything I should note.
Typically, any lockring will do, but it depends on which hub you have, not which cog you have, as it is the hub that accepts the lockring, not the cog. Most hubs use the ISO standard, but there are some out there that use separate standards.

33.5 mm ◊ 24 TPI Campagnolo, Gipiemme, Phil Wood, Miche
1.29" ◊ 24 TPI Shimano, Suntour, Formula, Dimension, Suzue, Surly, Zipp, Corima - This is the ISO standard.
33.0 mm ◊ 1 Mavic

There is one case where the lockring/cog combo matters, and that is when you use a 12 tooth cog. They come with their own special lockrings that have a smaller outer diameter, so that the chain doesn't ride on the lockring instead of the cog. I have only ever seen this combination use the ISO standard.
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Old 01-05-20, 04:43 PM
  #5712  
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Originally Posted by taras0000 View Post
Typically, any lockring will do, but it depends on which hub you have, not which cog you have, as it is the hub that accepts the lockring, not the cog. Most hubs use the ISO standard, but there are some out there that use separate standards.

33.5 mm ◊ 24 TPI Campagnolo, Gipiemme, Phil Wood, Miche
1.29" ◊ 24 TPI Shimano, Suntour, Formula, Dimension, Suzue, Surly, Zipp, Corima - This is the ISO standard.
33.0 mm ◊ 1 Mavic

There is one case where the lockring/cog combo matters, and that is when you use a 12 tooth cog. They come with their own special lockrings that have a smaller outer diameter, so that the chain doesn't ride on the lockring instead of the cog. I have only ever seen this combination use the ISO standard.
WOW that's very informative answer! I really appreciated
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Old 01-06-20, 11:23 PM
  #5713  
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Not sure where to ask this. Looked briefly but didn't find anything.

I'm lifting now and, among other things, doing the leg sled thing. My goal is to improve overall power and specifically peak power out to 35 seconds. I'm exploring limits on the sled and I'm honestly afraid of overdoing it.

Right now I have 260 lbs weight on the sled (total plates - 55+55+25 on each side). I can do 8 reps pretty readily but each one is a decent effort, it's just that I'm not getting that "failure" feeling like I do when I do other exercises. I might be able to do 12 or more reps if I kept going, but my goal is to increase peak power so I want to keep reps down and get the weight up. I'd call 260 lbs "medium heavy" to "heavy heavy". I can't imagine going much more than about 350 lbs at this point, and I'll be trying 280-300 next time out. I weigh 176-178, overweight by a solid 15-20 lbs of pure fat and theoretically should be able to lose another 10-15 lbs after that but the second bit doesn't seem realistic.

I asked someone ("former gymrat", not a rider, and not big by any means, he's much smaller than me, 140?) what he did and he said "600-700".

That didn't seem possible, but then again maybe I just don't know. It just seems really high.

I plan on transitioning to doing actual squats with free weights and a bar, but I'll ease into that. I plan on doing form squats soon, empty bar etc (from the UP UP UP thing).

So on the leg sled, at my weight, what sort of weight should I be able to do? If broadly categorizing like w/kg, what's like 3 w/kg weight, the 4 w/kg, the 5 w/kg?
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Old 01-07-20, 06:39 AM
  #5714  
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Looking back on my logs, back in summer 2018 I was single leg pressing 440lbs x 10 on each leg. The year before that, I was leg-pressing 775lbs 3 set of 5, in my 40s. I know of smaller guys who can do more than that.

One thing to remember is that, due to the angle of the sled, you aren't lifting that much weight vertically off of the ground. If the sled is 45 degrees, you are feeling about 72% of the weight (plates plus sled weight) on your feet.

That may still seem like a lot when compared to squatting, but know that when a person squats, they are actually squatting MORE than the plates and the bar. They are also adding their upper body weight to the mix. So, if a 200lb guy is squatting 150lbs on his shoulders, his legs are squatting 150lbs + 100lbs of upper body (round number for conversation's sake) for a total of 250lbs of load on his legs. Now, if he wanted to recreate the same level of load on the leg press machine, he'd have to have the sled and weights weigh about 350lbs.

In his log book, he'd note:
Squat: 150lbs.
Leg Press: 350lbs

And they'd essentially provide the same amount of load on his legs.

That is why leg press numbers seem so much higher than Squat numbers. No one is getting over by doing leg press. It's just a lot of not-so-obvious arithmetic going on. Basically, when you squat, you are squatting more than the numbers on the bar and when you leg press, you are pressing less than the numbers on the bar

Last edited by carleton; 01-07-20 at 06:55 AM.
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Old 01-07-20, 06:47 AM
  #5715  
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All of the leg press info is assuming that you are using a slanted leg press machine, like maybe 45 degrees.

If you are using a vertical leg press machine (where you lay on your back and push the weight directly up into the air), then you are lifting 100% of the weight listed.

It's difficult to speak about cable-driven leg press machines (the non-freeweight kind). These do lift the weight vertically in the air, but it may not be obvious if there are pulleys involved that provide some mechanical advantage (e.g. Move the move your feet 1 foot but raise the weight 0.5 feet).

To answer your question about leg press standards. To be honest, I think you'll be better served by finding a good, progressive leg press program and see how far you can go. I took the Starting Strength squat program and adapted it for Leg Press and Single Leg Press over the years with great success. I never focused on both. It was either my main lift was leg press or my main lift was single leg press for that long lifting period. I also used weightlifting shoes when the weight got heavier. This helped a lot.
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Old 01-07-20, 07:02 AM
  #5716  
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Thanks. I didn't think of the sled weight, it's got to be substantial, more than the 20kg or whatever an Olympic bar weighs.

Also the leg sled I use does go up at a 45-ish degree angle.

I don't know the brand, sled weight, etc, I'll have to take a picture of it when I go next (maybe now? I have to be at work soon though).
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Old 01-07-20, 07:17 AM
  #5717  
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Originally Posted by carpediemracing View Post
Thanks. I didn't think of the sled weight, it's got to be substantial, more than the 20kg or whatever an Olympic bar weighs.

Also the leg sled I use does go up at a 45-ish degree angle.

I don't know the brand, sled weight, etc, I'll have to take a picture of it when I go next (maybe now? I have to be at work soon though).
Yup. The sled is heavy. If you look carefully, you might notice the weight of the sled on a sticker somewhere. I've seen that sticker about 1/2 the time on sleds over the years. If you can't find the sticker, just google around between sets and see if you can find a product page of a similar-looking sled and see what that is. It should be close. Use that value in your log and calculations.

A simple program that I adapted from Starting Strength:

I'd lift leg press (or single leg press) 3 days/week with at least 1 day rest between.
My workout looked like this:

- Sled only: 5 reps
- Sled only: 5 reps
- 40% of working weight: 5 reps
- 60% of working weight: 3 reps
- 80% of working weight: 2 reps
- 100% of working weight: 5 reps
- 100% of working weight: 5 reps
​​​​​​​- 100% of working weight: 5 reps

So, if my target weight was 600lbs, I'd multiply 600 times .40, .60, and .80 to get the values for the sets listed above. They don't have to be exact. It's just warmup. Do what's easiest in terms of getting plates on and off. Don't go hunting for 2.5lb plates

I'd increase my target weight 20-40 lbs each day until I missed completing a rep or set (as per the book, just more weight because it's leg press not squat). However, if I felt really strong after the first set at 100% (maybe well-rested or well-fed), I'll add weight for the 2nd set forward. Basically, feel it out and don't be such a robot about it.

Remember not to cheat the rep. It's easy to cheat on the leg press just like the squat, where you don't go down deep enough.

I've seen people leg press heavy with only socks on. I think that's gross in a public gym. I really liked using weightlifting shoes (not just sneakers) for heavy leg press. It gave me a lot more confidence.

Don't sleep on leg press. Some of the top sprinters in the world use it as their main heavy lift. But, don't rely on it to train your core and back like the squat does. So, you'll have to do deadlifts as well. I did them twice a week.
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Old 01-07-20, 07:24 AM
  #5718  
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When you said Leg Sled, I was thinking of the sled where you stack weight on top then push it across the floor.

And as Carleton said, you should be able to press a lot more weight than you can squat or deadlift.

Lastly, I prefer going barefoot as the weight gets heavier. I am much more stable without shoes. And I have incredibly wide feet, so I can't really find lifting shoes that fit me well.
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Old 01-07-20, 07:29 AM
  #5719  
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Originally Posted by topflightpro View Post
When you said Leg Sled, I was thinking of the sled where you stack weight on top then push it across the floor.

And as Carleton said, you should be able to press a lot more weight than you can squat or deadlift.

Lastly, I prefer going barefoot as the weight gets heavier. I am much more stable without shoes. And I have incredibly wide feet, so I can't really find lifting shoes that fit me well.
Maybe look into Deadlift Slippers:


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Old 01-07-20, 07:31 AM
  #5720  
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Lots of great info here: https://www.bikeforums.net/track-cyc...t-lifting.html
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Old 01-07-20, 07:44 AM
  #5721  
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If you're looking to improve maximal POWER, you may need to do some different things to lifting as much as you can on a leg press. You might want to try some explosive movements, like single leg press throws, power cleans, and box jump type stuff.
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Old 01-07-20, 07:48 AM
  #5722  
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Originally Posted by carleton View Post
This is great, thanks.
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Old 01-07-20, 07:51 AM
  #5723  
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Originally Posted by Baby Puke View Post
If you're looking to improve maximal POWER, you may need to do some different things to lifting as much as you can on a leg press. You might want to try some explosive movements, like single leg press throws, power cleans, and box jump type stuff.
I hear you. I'm ramping up slowly, I want to avoid injuries. The leg press throws and box jump stuff will be in my future. I have to pedal better also. Long list of things to do.
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Old 01-07-20, 08:19 AM
  #5724  
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Originally Posted by Baby Puke View Post
If you're looking to improve maximal POWER, you may need to do some different things to lifting as much as you can on a leg press. You might want to try some explosive movements, like single leg press throws, power cleans, and box jump type stuff.
re BP's comment, one of the helpful things somebody taught me is that strength is base training for power. so the progression goes: strength -> power (strength fast) -> speed (using power to go fast) -> speed endurance (going fast for a longer period of time).
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Old 01-07-20, 05:55 PM
  #5725  
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Originally Posted by queerpunk View Post
re BP's comment, one of the helpful things somebody taught me is that strength is base training for power. so the progression goes: strength -> power (strength fast) -> speed (using power to go fast) -> speed endurance (going fast for a longer period of time).

Exactly.

Coincidentally, thatís also thatís the order of how long gains in those areas lasts. Meaning: Strength lasts longer than Power which lasts longer than Speed which lasts longer than Speed Endurance.

Thatís the order in which you should train those skills so that they stack and compliment each other.

Basically, itís useless to train for Speed 8 months out from your big event. And you missed the boat if you start training Strength a month out from your big event.

This is why you see sprinters train raw strength in the winter and top speed and speed endurance behind a motorbike a couple of weeks before their big event.
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