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Search: Posts Made By: gsa103
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Replies: 5
Views: 533
Posted By gsa103

Thanks, I'll check for that! Any idea what it...

Thanks, I'll check for that! Any idea what it would be worth?
Replies: 5
Views: 533
Posted By gsa103

Help identify this vintage steel bike (Campy)

Can anyone help shed some details on this bike. It belonged to my late uncle, I'm trying to figure out how much it's worth.
I'm looking to sell the bike, as I already have a full suite of bikes...
05-18-21, 04:37 PM
Replies: 69
Views: 5,666
Posted By gsa103

The other thing that needs to be stated. The...

The other thing that needs to be stated. The entire peloton is absolutely terrified of Sagan. He used to be able to jump into a break and do something, now the entire break just shuts down. The...
05-18-21, 04:23 PM
Replies: 66
Views: 6,433
Posted By gsa103

Huh? These are pretty widely available, and not...

Huh? These are pretty widely available, and not even that expensive. There is basically zero difference between that and a flat-bar gravel bike. Well, the gravel bike will use 700x50 tires instead...
05-06-21, 11:30 AM
Replies: 15
Views: 2,164
Posted By gsa103

Not a problem at all. General rule of thumb...

Not a problem at all.

General rule of thumb for Li-Ion batteries. Keep it in the 80%-20% range for normal usage. For example, Tesla recommends charging often ("A plugged in Tesla is a happy...
05-06-21, 11:20 AM
Replies: 23
Views: 1,038
Posted By gsa103

The big difference is that tube can move relative...

The big difference is that tube can move relative to tire carcass. So as the tube flexes and distorts the sealant plug gets knocked loose. With a tubeless tire, the carcass is thicker and the...
05-06-21, 11:09 AM
Replies: 5
Views: 1,657
Posted By gsa103

You'll probably need annual chain replacements,...

You'll probably need annual chain replacements, other than that, it should be pretty minimal.
Gearing-wise, I'd probably go with the 44T or the 42T, if it's a hilly area. I'm assuming you have...
05-06-21, 10:56 AM
Replies: 9
Views: 1,713
Posted By gsa103

Below 50V, the resistance of your body will...

Below 50V, the resistance of your body will prevent a lethal shock from occurring. That's a guideline from most electrical safety stuff. A 48V battery is technically above that, 54.6V at full...
04-23-21, 11:32 AM
Replies: 35
Views: 3,361
Posted By gsa103

Huh? There's plenty of options for what you...

Huh? There's plenty of options for what you want. My Giant Toughroad weighs ~48lbs with rack and Luna BBS02 kit. The Giant Explore E+ is 48lbs, has a rack and lights, and an MSRP of $3100. They...
Forum: Road Cycling
03-23-21, 06:03 PM
Replies: 27
Views: 2,703
Posted By gsa103

Road shoes/cleats are optimized for professionals...

Road shoes/cleats are optimized for professionals who are riding 200+ km stages and capable of putting out >1200W sprints. They walk from the bus, to the bike parked next to the bus, and that's it. ...
Forum: Road Cycling
03-23-21, 05:54 PM
Replies: 22
Views: 854
Posted By gsa103

I was about to ask that. What are you using for...

I was about to ask that. What are you using for rim tape? The rim tape should go across the full width, not just over the inner channel. Slightly thicker or double-wrapping may help.

And once...
Forum: Road Cycling
03-23-21, 05:45 PM
Replies: 31
Views: 2,653
Posted By gsa103

You forgot poor biomechanics. That's trainable,...

You forgot poor biomechanics. That's trainable, but people rarely train cycling technique (other than some mountain bike skills). And triathletes are a different case, it makes sense for them to...
03-23-21, 02:54 PM
Replies: 12
Views: 1,160
Posted By gsa103

Assuming you're not running the derailleur at or...

Assuming you're not running the derailleur at or above capacity. It can get even trickier with full-suspension bike operating at capacity. Big-big is safer, but small-small works better for...
03-23-21, 10:46 AM
Replies: 7
Views: 1,038
Posted By gsa103

I don't have a gear sensor, I just use the front...

I don't have a gear sensor, I just use the front brake lever as a clutch while shifting. Even with hydraulic disc brakes you should be able to get the sensor to disconnect without introducing any...
03-22-21, 06:19 PM
Replies: 11
Views: 683
Posted By gsa103

There's two basic strategies for Shimano,...

There's two basic strategies for Shimano, top-down or bottom-up. The Park video is the bottom-up strategy. The official Shimano procedure is a top-down, which doesn't require the syringe, just...
03-22-21, 02:52 PM
Replies: 5
Views: 468
Posted By gsa103

It's pretty simple. If the tire has the same...

It's pretty simple. If the tire has the same volume as the air chamber, the new pressure will be half 1/(1+1). If the tire is 2x the volume of the chamber it will be 1/3 the pressure after 1/(1+2)....
03-22-21, 01:24 PM
Replies: 5
Views: 468
Posted By gsa103

For a fat bike, you can probably just load it up...

For a fat bike, you can probably just load it up to whatever is comfortable pumping it up to. The pressure will go down when it expands to the volume of the tire. I'd go to at least to about 120psi...
03-19-21, 06:38 PM
Replies: 23
Views: 4,770
Posted By gsa103

Rule #25: The bikes on top of your car should be...

Rule #25: The bikes on top of your car should be worth more than the car.
03-19-21, 12:22 PM
Replies: 28
Views: 2,464
Posted By gsa103

That bike is very difficult to lock-up. Your...

That bike is very difficult to lock-up. Your best bet is to carry a hefty chain and lock it to a solid object. Chain through the rear wheel is probable the only option.
A lot of theft depends on...
03-18-21, 10:12 AM
Replies: 18
Views: 1,829
Posted By gsa103

$120, yike. You could probably cobble...

$120, yike.
You could probably cobble something together with a rectifier, some caps and a buck converter.
A 7805 is very good a providing at reliable supply, but they're not at all efficient. ...
03-18-21, 10:03 AM
Replies: 18
Views: 802
Posted By gsa103

For home use, a 5Nm fixed value torque driver...

For home use, a 5Nm fixed value torque driver covers probably 95% of the small fasteners. Look at the stems and other things on your bike and see what the torque value is for them. If you need less...
03-15-21, 04:38 PM
Replies: 35
Views: 3,361
Posted By gsa103

A battery and motor generally add about 20lbs to...

A battery and motor generally add about 20lbs to a bike, so that quickly puts bikes into the 40-50lbs territory, because they're based on 30lbs bikes. The Specialized Turbo Vado SL is ~33lbs, but...
03-15-21, 04:24 PM
Replies: 26
Views: 1,045
Posted By gsa103

Don't tighten the top cap down so much. Just get...

Don't tighten the top cap down so much. Just get it snug. The air pressure in the tire keeps it closed, the screw is redundancy. If you really tighten the top cap down, you're more likely to...
Forum: Road Cycling
03-10-21, 05:38 PM
Replies: 112
Views: 5,890
Posted By gsa103

The reason the TT specialists go big has nothing...

The reason the TT specialists go big has nothing to do with the front gear efficiency. They go big because of the REAR gear efficiency. Small gears below about a 15T are less efficient, especially...
Forum: Road Cycling
03-05-21, 12:44 PM
Replies: 24
Views: 1,324
Posted By gsa103

Modern tubeless rims don't let go of tires, ask...

Modern tubeless rims don't let go of tires, ask anyone who's tried to change a tire on a newer rim lately. Especially for the one-day races, tubeless vs latex makes very little difference. With a...
03-05-21, 11:38 AM
Replies: 39
Views: 3,527
Posted By gsa103

If the batteries are imbalanced, when you connect...

If the batteries are imbalanced, when you connect them in parallel they will re-balance INSTANTLY, and draw VERY high current during the process. A 2V imbalance in the battery packs can result in...
03-03-21, 11:54 AM
Replies: 89
Views: 20,374
Posted By gsa103

Most of the time it'll fry the voltage regulator,...

Most of the time it'll fry the voltage regulator, and hard to say what else after that. The voltage regulator is probably U5, but I can't read the label on it to confirm. I'd say it's 50/50 as to...
03-02-21, 07:02 PM
Replies: 7
Views: 1,102
Posted By gsa103

Only if you have spare batteries, which most...

Only if you have spare batteries, which most people probably don't carry. At this point Li-ion batteries are cheap and so dramatically better, that I can't recommend anyone get a AA powered light. ...
03-02-21, 06:40 PM
Replies: 13
Views: 3,029
Posted By gsa103

By default, the Garmin will use GPS data to...

By default, the Garmin will use GPS data to calibrate the speed sensor. The speed sensor is the primary source, but something like a 500m segment the GPS can get a really accurate measurement of the...
03-02-21, 03:42 PM
Replies: 32
Views: 1,565
Posted By gsa103

3d Printers are simultaneously very fast and...

3d Printers are simultaneously very fast and really slow. My average print is probably about 8hrs. In a little over a year, my printer has 80 days of print time. Most of the time it's a about...
03-01-21, 06:21 PM
Replies: 76
Views: 4,923
Posted By gsa103

Run wider mountain bike tires. Running standard...

Run wider mountain bike tires. Running standard trail pressure on flat ground, I tend to top out at at 35kph. If you're hitting 50 kph, it's because you're going downhill, and you'd probably hit 45...
03-01-21, 05:56 PM
Replies: 70
Views: 9,940
Posted By gsa103

Fat tires can run lower pressure and the air...

Fat tires can run lower pressure and the air cushion provides suspension. The main disadvantage of fatter tires is rolling resistance, which doesn't matter with an eBike.
The extra suspension is...
03-01-21, 01:21 PM
Replies: 32
Views: 1,565
Posted By gsa103

But, but....I have a hammer (3d printer),...

But, but....I have a hammer (3d printer), everything must be a nail!
+1 for BBG, I bought a nice anodized one for my Yeti.
And yes, I'm also a 3d printer addict (FDM & SLA). Definitely...
03-01-21, 01:11 PM
Replies: 14
Views: 1,797
Posted By gsa103

Step 1: Sell your existing wheels. Step 2: ...

Step 1: Sell your existing wheels.
Step 2: Buy the wheels you actually want.
Doing the conversion will involve new hubs, new spokes, and re-lacing the wheel. You might as well just buy new...
03-01-21, 01:08 PM
Replies: 15
Views: 918
Posted By gsa103

Battery bars typically measure voltage and can be...

Battery bars typically measure voltage and can be accurate or inaccurate, depending on the correction applied. Li-ion battery drain is quite non-linear, the voltage drops very quickly at the start...
02-26-21, 08:58 PM
Replies: 26
Views: 1,666
Posted By gsa103

Hub drives tend to struggle more with hills,...

Hub drives tend to struggle more with hills, because they can't use the bicycles gearing. Looking at the Grin motor simulator, a 500W Bafang will overheat very quickly >10% grades. A BBS02 and...
02-25-21, 03:17 PM
Replies: 26
Views: 1,666
Posted By gsa103

Deore is a tier of Shimano components, designed...

Deore is a tier of Shimano components, designed for mountain bikes. Currently, Deore is available in 10, 11 or 12 speed. It will take cassettes up to 51t, and the Deore rear derailleur is designed...
02-25-21, 12:15 PM
Replies: 14
Views: 1,692
Posted By gsa103

Bafang is fine. The integration here is garbage....

Bafang is fine. The integration here is garbage. If you look closely at a Bafang motor mount, there's an extra screw hole, so you can bolt the motor to the frame. Jones didn't even bother to...
02-25-21, 12:01 PM
Replies: 34
Views: 3,008
Posted By gsa103

My bike is a Giant Toughroad (rigid 29er...

My bike is a Giant Toughroad (rigid 29er touring), so probably lighter, but not all that different. My battery draw is based on perfectly flat, no wind, good pavement, and I'm probably adding ~150W....
02-25-21, 11:40 AM
Replies: 26
Views: 1,666
Posted By gsa103

When you say very hilly, what do you mean (what %...

When you say very hilly, what do you mean (what % grades)? 42:32 is pretty normal by ebike standards, for urban riding. For example, a Specialized Turbo Vado is 40:36, so lower, but it only has a...
02-24-21, 07:43 PM
Replies: 8
Views: 1,350
Posted By gsa103

On a bike like a Sirrus, I'd go for a 48t, unless...

On a bike like a Sirrus, I'd go for a 48t, unless you have lots of really hellacious hills (>8%). A 48/28 combination is doing 8mph at 60rpm. Most people riding an ebike are going to want to go...
02-24-21, 07:30 PM
Replies: 34
Views: 3,008
Posted By gsa103

Cadence is irrelevant on the BBS motors. The...

Cadence is irrelevant on the BBS motors. The motor will continue to put out power at 120rpm and higher. The PAS will continue to supply power even if you're only pedalling at 60 rpm and the motor...
Forum: Road Cycling
02-24-21, 06:22 PM
Replies: 23
Views: 1,785
Posted By gsa103

Cheap, reliable, light. Pick 2. Buy the DA...

Cheap, reliable, light. Pick 2. Buy the DA cassette if you want reliable shifting. Bodge something together if you don't want to spend the money. The reason you can't get perfect shifting is that...
02-24-21, 05:40 PM
Replies: 18
Views: 1,597
Posted By gsa103

At least a couple of the local bike shops in your...

At least a couple of the local bike shops in your area should be able to do basic fork/shock service. Look for any bike shop that caters to mountain bikes.
Shock service on a basic air shock is...
02-23-21, 12:06 PM
Replies: 7
Views: 868
Posted By gsa103

The bearings are probably frozen in place anyway,...

The bearings are probably frozen in place anyway, and the suspension was probably garbage even new. All things considered it's probably better now.
02-18-21, 07:55 PM
Replies: 27
Views: 2,014
Posted By gsa103

29er on 2.25tires at 140lbs, I think the correct...

29er on 2.25tires at 140lbs, I think the correct pressure is somewhere around 20psi, probably a hair under. For reference, I ride 26x2.35 at 160lbs, and I run 18/22 tubeless. You're lighter with...
02-16-21, 01:05 PM
Replies: 29
Views: 1,516
Posted By gsa103

Geared DC motors are very common. The fact is...

Geared DC motors are very common. The fact is that electric motors like high RPM, in all configurations. Most applications use a integrated gear box, even Tesla uses an 8:1 reduction. A 250W hub...
02-12-21, 03:33 PM
Replies: 26
Views: 3,084
Posted By gsa103

Torque sensing provides much better feel because...

Torque sensing provides much better feel because it's amplifying your natural effort level. That's typically only found in mid-drives, and mostly in pre-built bikes. A mid-drive can integrate the...
02-12-21, 03:19 PM
Replies: 20
Views: 754
Posted By gsa103

I tried them as well because I ride with goat...

I tried them as well because I ride with goat heads. They will self-seal enough to get you home, but not more than that. The flex between the tire & tube means that the sealant can't properly seal,...
02-11-21, 03:48 PM
Replies: 68
Views: 9,854
Posted By gsa103

The simple answer is a steel insert sleeve for...

The simple answer is a steel insert sleeve for CF. Every other application is the outer bearing race is pressed into a steel insert. But that's too heavy, it would add at least 100g likely more,...
Showing results 1 to 50 of 1000
 


 
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