281 reputation
211
bio website none
location Prague, Czech Republic
age 31
visits member for 1 year, 11 months
seen Apr 29 at 20:09

Czech beer is awesome


Aug
27
comment Spoke tension - is a left tilt ok to prevent explosion?
@Vorac I'm not trusting my tension measuring tool. I'm currently building a frame where I can install a spoke and increase the tension according to a scale. Then I can evaluate if the relative values from the tensiometer chart are correct. As soon as this is done, I will give you more feedback.
Jul
4
comment Spoke tension - is a left tilt ok to prevent explosion?
@markd it is slightly asymentrical in the frame. However, modern brakes have an adjustment screw to shift the brake center a few mm to the left.
Jul
4
comment Spoke tension - is a left tilt ok to prevent explosion?
@DanielRHicks The nipples are stable, but the spoke breaks inside of the nipple, hence if you look into the nipple from the side that the spoke was screwed in, you see a few unused nipple threads followed by the broken off spoke threads. This is tipically a sign of to loose spoke tension.
Apr
25
comment How can somebody with Type I diabetes keep blood sugar levels acceptable during and after a multi-hour ride?
@robthewolf sry didn't see that :-) I'll have a look.
Apr
24
comment Brakepads are burning tyres out
Can you post a picture? Maybe from the front but slightly rotated to one side, that we can see the pads and the rims. Best break at the same time, that the pads touches the rims.
Apr
17
comment How can somebody with Type I diabetes keep blood sugar levels acceptable during and after a multi-hour ride?
Can you also post which kind of insulin you use at what times? What kind and how much basal insulin do you use? Before bedtime? Do you eat after your workout, or does your level rise without injecting or does the level rise on its own with no food?
Mar
17
comment Size of Pedal Threading on old German Glockenlager?
Thanks for the ideas. It might actually be a normal thread. It is fatter than 14mm, more like 14,2mm, therefore it can't be French. After measuring again it could be 20 tpi. Somehow I though 24 is normal, but it is actually 20 tpi. Some shop was selling 24 tpi drills, that must have thrown me off. Because I can only there 4 threads it isn't very accurate, but I will just try my luck.
Aug
24
comment Calibrate Tensiometer
Did so now. See if they still answer today. But I still want to build this tool, just for the sake of it.
Aug
24
comment Calibrate Tensiometer
Thanks, but not quite yet... I still think the forces are in no comparision. Imagine the whole costruction (scale, spoke and frame) are under 1600N of tension. If I now apply a small perpendicular force (maybe 25N through the TM-1) against the spoke, the measured weight may increase max. to 1625N, which is neglectable. The tensiometer only measures relativly how easy it is to bend the spoke sideways given a certain tension. Other components such as the scale don't get any perpendicular presure, and are therefore not part of the measurment. I still don't see a hazard for seriously wrong results
Aug
24
comment Calibrate Tensiometer
Yeah that makes sense, but the added tension to my spoke through the measuring tool should be neglectable compared to initial tension of 1600N. I don't think the bending of the spoke will have an great impact. I want to build something like discussed on the other board. Please click the link in my edited inital post (right at the bottom) and just quickly scroll through the thread to see the pictures. Then we might have the same understanding of what I want to do :-)
Aug
24
comment Calibrate Tensiometer
Thanks, yes my spoke type is not listen. The aero spokes are only 1mm thick. Park Tool has only listen aero spokes starting from 1,5mm thickness. I want to know if I can use the scale from the link, or if that will somehow give my wrong results. Furthermore I would like to know why the results from spring based scales in combination with tensionmeters would give me a wrong result.
Aug
24
comment Calibrate Tensiometer
That was my first idea, but I can't think of any place to mount the spoke, and I can't think of anything that weighs 160kg and is mountable to a spoke... :-(
Aug
2
comment Skid on small frame
I never removed the brakes and I mostly use then. Skidding for me is not about halting quickly, but just for playing around to get a better feeling for bikes. I now managed a short skid on a really clean surface, but shoved both legs against the stearing bar. Managing it sitting would be nicer though :-)