Go Back  Bike Forums > Search Forums
Reload this Page >

Search Results

Notices
 
Search: Posts Made By: tomtomtom123
Showing results 1 to 50 of 967
Search took 0.04 seconds.
08-20-20, 08:39 AM
Replies: 94
Views: 2,898
Posted By tomtomtom123

After trying harder to look up more information,...

After trying harder to look up more information, I still couldn't figure out exactly how to translate the external forces into internal forces within the closed wheel system. One video showing the...
08-19-20, 02:01 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

You are mixing up radial and torque loads caused...

You are mixing up radial and torque loads caused by the braking force.

(edit: after thinking more, disc brakes don't create radial loads on the axle, so no radial loads get transmitted to the...
08-18-20, 10:32 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

Ok just for fun I tried calculating the...

Ok just for fun I tried calculating the additional load on the spokes from braking.

(edit: after thinking more, disc brakes don't create radial loads on the axle, so no radial loads get...
08-18-20, 07:03 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

Not 4 times the total load. 4 times (edit: 8...

Not 4 times the total load. 4 times (edit: 8 times, could be off, see latest post with calculations) the additional load from the braking (on top of the pretension).
(edit: after thinking more, disc...
08-18-20, 07:01 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

It's the other way around. If they decided to use...

It's the other way around. If they decided to use a single extrusion die, then they would not design a weaker profile for rim brakes and then use the same version for disc brake. Instead they would...
08-18-20, 06:04 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

You've completely missed the point. You claimed...

You've completely missed the point. You claimed that some model of rim had the same profile for both the rim brake and disc brake version. This implies using the same extrusion die. If both versions...
08-18-20, 05:52 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

I think you're missing the point. In your...

I think you're missing the point. In your previous posts, you claimed that the forces on the spokes and spoke holes will be identical for both rim brake and disc brake models. You also said that rim...
08-18-20, 05:40 PM
Replies: 5
Views: 179
Posted By tomtomtom123

https://www.parktool.com/blog/repair-help/hub-over...

https://www.parktool.com/blog/repair-help/hub-overhaul-and-adjustment
You can search youtube for videos.

Typical locknut torque is around 10-15 Nm. Are you tightening the locknut against the...
08-18-20, 05:32 PM
Replies: 11
Views: 277
Posted By tomtomtom123

https://www.parktool.com/blog/repair-help/crank-re...

https://www.parktool.com/blog/repair-help/crank-removal-and-installation-three-piece

You need an 8mm hex allen key to remove the M8 crank bolts first. Then use a crank puller tool, with an...
08-18-20, 04:45 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

The reason why both rim brake and disc brake...

The reason why both rim brake and disc brake version of a rim model may have the same extrusion profile is for economics. Why spend several thousands of dollars for a second set of extrusion dies...
08-18-20, 04:16 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

Someone please lock the thread to stop the spread...

Someone please lock the thread to stop the spread of misinformation.

I believe everyone should stop trying to convince the people who don't believe that spokes and spoke holes experience greater...
08-18-20, 03:37 AM
Replies: 94
Views: 2,898
Posted By tomtomtom123

It's not only the spokes that experience...

It's not only the spokes that experience differences in forces between disc and rim brake wheels. The connections between the ends of the spokes will also experience equivalent amounts of force. That...
08-17-20, 08:05 PM
Replies: 94
Views: 2,898
Posted By tomtomtom123

(edit: after thinking more, disc brakes don't...

(edit: after thinking more, disc brakes don't create radial loads on the axle, so no radial loads get transmitted to the spokes.)

My force diagram clearly shows how disc brakes apply greater...
08-17-20, 11:12 AM
Replies: 94
Views: 2,898
Posted By tomtomtom123

I made another diagram. Hopefully it's easier to...

I made another diagram. Hopefully it's easier to understand. Imagine the cross section of the wheel is a see-saw (represented by the translucent black box), and the bicycle/world is rotated 90...
08-17-20, 09:08 AM
Replies: 94
Views: 2,898
Posted By tomtomtom123

You are wrong. The hub runs on bearings, so it is...

You are wrong. The hub runs on bearings, so it is effectively a roller system. It is not fixed. Therefore the axle fixed to the frame does not transmit torque through the bearings to the hub and to...
08-17-20, 03:17 AM
Replies: 94
Views: 2,898
Posted By tomtomtom123

ost people here have it wrong. Rim brakes do not...

ost people here have it wrong. Rim brakes do not transfer the (edit: torque load from) braking force to the spokes, while disc brakes do (through only half of the spokes, trailing, possibly more on...
08-12-20, 05:32 PM
Replies: 29
Views: 896
Posted By tomtomtom123

If you want to know whether your chainring moved...

If you want to know whether your chainring moved outward, why not simply measure and find out?
08-10-20, 06:22 PM
Replies: 9
Views: 351
Posted By tomtomtom123

I just use an elastic string tied in a loop,...

I just use an elastic string tied in a loop, running through one of those button spring drawstring clips. It cost less than $1 to make myself. I wrap it around the brake lever and pull the string...
Forum: Folding Bikes
08-10-20, 03:13 PM
Replies: 26
Views: 2,064
Posted By tomtomtom123

Well, it's not really a folding bike. Only the...

Well, it's not really a folding bike. Only the handle post folds. It seems similar to the old model but with additional features like the foot platform, wheel guard, rohloff, maybe a stiffer frame....
08-03-20, 03:29 AM
Replies: 32
Views: 1,046
Posted By tomtomtom123

Maybe try 3d printing your own plugs for your...

Maybe try 3d printing your own plugs for your custom diameter.
08-03-20, 01:33 AM
Replies: 8
Views: 347
Posted By tomtomtom123

I go low. Minimum on 110bcd if 33t. If you want...

I go low. Minimum on 110bcd if 33t. If you want smaller chainring you'd need another crank with smaller BCD. Or going with triple with a triplizer ring from ta or stronglight for 110bcd which allows...
08-02-20, 06:34 AM
Replies: 31
Views: 779
Posted By tomtomtom123

FC-4703 is around $80-85 around here. TA and...

FC-4703 is around $80-85 around here.

TA and Stronglight both make 5 bolt 74/110/130 BCD chainrings that could work. The chainline may come out a little different than the original, but you could...
08-02-20, 01:30 AM
Replies: 11
Views: 750
Posted By tomtomtom123

I'm talking about a respirator to better protect...

I'm talking about a respirator to better protect yourself. Not a mask. I wear something on my face whenever I am near people. Many people are not compliant with local rules on distancing. As I'm most...
08-01-20, 04:33 PM
Replies: 10
Views: 330
Posted By tomtomtom123

Smallest chainring for 110bcd is 33t. To go lower...

Smallest chainring for 110bcd is 33t. To go lower you need smaller BCD. The grx with the 46/30 actually could probably go down to 26 or 28 but Shimano doesn't make them. It uses uncommon BCD and...
Forum: Folding Bikes
08-01-20, 06:03 AM
Replies: 21
Views: 1,111
Posted By tomtomtom123

Here is Ridea's adapter for Dahon. FDSD2 ...

Here is Ridea's adapter for Dahon. FDSD2
https://www.rideabikes.com/product/bicycle/city/dahon/components---accessories/front-derailleur-adapter...
Forum: Folding Bikes
08-01-20, 04:44 AM
Replies: 21
Views: 1,111
Posted By tomtomtom123

Ohhhh the ridea cranks look nice. Narrow 148mm q...

Ohhhh the ridea cranks look nice. Narrow 148mm q factor with 74/130 BCD double in any length. Option for titanium spindle.
https://www.rideabikes.com/product/bicycle/road/cranks/es-series/es-r5-mt
...
Forum: Folding Bikes
07-31-20, 10:25 AM
Replies: 21
Views: 1,111
Posted By tomtomtom123

I wonder if the curvy shape of the vertical...

I wonder if the curvy shape of the vertical bracket would get in the way of attaching a chain catcher. Also the flat front surface of the braze on mount might be problematic for the curved nuts that...
07-30-20, 04:05 AM
Replies: 9
Views: 394
Posted By tomtomtom123

It's fairly normal to shim the BB cups to adjust...

It's fairly normal to shim the BB cups to adjust the left and right crank arms to get them symmetric. One thing you could do is to measure your front chain line and crank symmetry first before...
07-30-20, 03:55 AM
Replies: 10
Views: 330
Posted By tomtomtom123

What is the BCD of your crank? Going from 11-32...

What is the BCD of your crank? Going from 11-32 to 11-34 means wider stepping. How many speed is the cassette? You would get more functional gearing and a wider range if you lowered your small...
Forum: Folding Bikes
07-29-20, 08:35 AM
Replies: 51
Views: 4,916
Posted By tomtomtom123

I don't think it's a question of too much weight,...

I don't think it's a question of too much weight, although the maximum I would carry is maybe 18-20kg if you include the weight of the bags. I prefer to pedal over 76rpm because it doesn't feel...
Forum: Folding Bikes
07-29-20, 04:48 AM
Replies: 51
Views: 4,916
Posted By tomtomtom123

Most gear range calculators are too high because...

Most gear range calculators are too high because their tire diameters are oversized. For my 406x2.1 tires, I use 1580mm circumference in my calculations, which is 503mm or 19.8" diameter. I sit on...
Forum: Folding Bikes
07-29-20, 03:52 AM
Replies: 51
Views: 4,916
Posted By tomtomtom123

Also the product photos of your specific bike...

Also the product photos of your specific bike seems to show that it already has a braze on mount for the FD, and if you do have it then you don't need to worry about getting an adapter. However if...
Forum: Folding Bikes
07-29-20, 03:41 AM
Replies: 51
Views: 4,916
Posted By tomtomtom123

Is the Rd total chain wrap capacity 41t? You...

Is the Rd total chain wrap capacity 41t? You could exceed it as long as you make the chain long enough to get to big-big, and allow the small-small to drag. This means you won't be using the...
07-22-20, 04:02 AM
Replies: 11
Views: 750
Posted By tomtomtom123

Disinfection by steaming may work if done...

Disinfection by steaming may work if done correctly but I just leave my respirators in a paper bag in a dry place for 5 days before reusing, because it's the least risk of damage and I have more...
07-20-20, 05:18 PM
Replies: 16
Views: 387
Posted By tomtomtom123

As others have said, changing from 27 to 30 max...

As others have said, changing from 27 to 30 max cog is 30/27 = 11.1% step. It's like 1 gear. If you want even lower, you could also decrease the size of your chainrings. Also as others have said, the...
07-18-20, 03:53 AM
Replies: 13
Views: 442
Posted By tomtomtom123

If you look for the exploded EV drawings, you can...

If you look for the exploded EV drawings, you can check to see if part numbers of the cogs match with a different cassette that has 11,13 or 11,12,13 to the part numbers on your cassette. If they do...
07-18-20, 03:12 AM
Replies: 2
Views: 192
Posted By tomtomtom123

If you're referring to the dual drive, sometimes...

If you're referring to the dual drive, sometimes the tab that goes under the shift pin head gets a little bent and instead hits the wider head when trying to push the button on the box. It helps if...
07-18-20, 03:06 AM
Replies: 15
Views: 569
Posted By tomtomtom123

Would it help if you replaced the screws with DIN...

Would it help if you replaced the screws with DIN 912 or 913 with hex socket, like what SRAM uses?
07-14-20, 11:15 AM
Replies: 18
Views: 497
Posted By tomtomtom123

Internal gear hubs have a max torque/gear ratio...

Internal gear hubs have a max torque/gear ratio recommendation. I don't know what it would be for your hub but the inter8 manual says:
TO ENSURE SAFETY
For Installation to the Bicycle, and...
07-14-20, 09:09 AM
Replies: 11
Views: 750
Posted By tomtomtom123

When I have longer rides on paths with close...

When I have longer rides on paths with close proximity to people or with plans to walk into enclosed spaces on the way, I wear a silicone half face respirator with exhalation valve and one way flow...
Forum: Road Cycling
07-14-20, 08:51 AM
Replies: 27
Views: 1,565
Posted By tomtomtom123

The roundabouts here are usually in higher...

The roundabouts here are usually in higher traffic areas so there is an elevated sidewalk with a bike lane around it. Usually if there is a bike lane on the road leading up to the intersection, maybe...
07-14-20, 08:40 AM
Replies: 2
Views: 162
Posted By tomtomtom123

I don't have experience with this but I think...

I don't have experience with this but I think it's probably the length of the skewer and not width of the dropouts. the more important dimension is the minimum length that you can trim the skewer to,...
07-13-20, 04:39 PM
Replies: 41
Views: 1,164
Posted By tomtomtom123

Just tape a giant cardboard to the front of your...

Just tape a giant cardboard to the front of your bike.
07-11-20, 06:31 PM
Replies: 15
Views: 624
Posted By tomtomtom123

I wouldn't imagine that you'd get good grip with...

I wouldn't imagine that you'd get good grip with brake pads/blocks if the rim wall surface were curved. Most of the disc brake rims that I've seen are really curvy. Although some models that are...
07-11-20, 06:24 PM
Replies: 75
Views: 3,086
Posted By tomtomtom123

https://youtu.be/bzE-IMaegzQ

https://youtu.be/bzE-IMaegzQ
07-11-20, 06:19 PM
Replies: 35
Views: 1,268
Posted By tomtomtom123

UPF standards vary. There is an American and an...

UPF standards vary. There is an American and an Australian version. I think both only test new, unworn, unwashed, unstretched fabric, so the rating can be misleading for normal use. There is a...
Forum: Foo
07-11-20, 06:09 PM
Replies: 12
Views: 814
Posted By tomtomtom123

I noticed that some of the restaurants around...

I noticed that some of the restaurants around here have an ashtray container that have water inside of it, so the ash that drops through the grill of the tray will fall into the water.
Forum: Road Cycling
07-11-20, 05:45 PM
Replies: 108
Views: 6,093
Posted By tomtomtom123

No. Because the respirator is on my face between...

No. Because the respirator is on my face between the time that I step out of the apartment until I return, since I usually ride for the purpose of going into an enclosed space filled with people...
07-11-20, 05:12 PM
Replies: 26
Views: 952
Posted By tomtomtom123

The chain does look shorter than I would use,...

The chain does look shorter than I would use, maybe add 2 more links, but I don't think it's short enough to cause serious problems, there "appears" to still be a bend in the RD, so at least it...
07-11-20, 03:57 AM
Replies: 6
Views: 326
Posted By tomtomtom123

You need to provide more details. What kind of...

You need to provide more details. What kind of BB, shell, crank, chainring, what type of spacers, on the spindle or the BB, which type of spider, which side of spider, dropout width, measured chain...
Showing results 1 to 50 of 967
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.