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Search: Posts Made By: 2_i
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Forum: Folding Bikes
08-07-20, 06:58 PM
Replies: 2
Views: 191
Posted By 2_i

Not sure here. Brompton has a wheelbase of...

Not sure here. Brompton has a wheelbase of 104.5cm, within the bracket for a full size bikes. Folders typically have a shorter wheelbase giving rise to a squirrelly handling. Now this 20" 'Brompton'...
Forum: Folding Bikes
08-06-20, 10:06 PM
Replies: 16
Views: 527
Posted By 2_i

Suspended fork?!

Suspended fork?!
08-05-20, 10:36 AM
Replies: 50
Views: 1,120
Posted By 2_i

Well, the bike certainly raises suspicion as far...

Well, the bike certainly raises suspicion as far as rusting alu and plastic are concerned. I presume being a thief involves some expertise in materials :D
08-01-20, 08:27 PM
Replies: 12
Views: 254
Posted By 2_i

There is this paper: "Effects of Frictional Loss...

There is this paper: "Effects of Frictional Loss on Bicycle Chain Drive Efficiency", Spicer et al, J. Mech. Des. 123 (2001) 598, https://doi.org/10.1115/1.1412848, that claims that losses due to...
08-01-20, 05:11 PM
Replies: 12
Views: 254
Posted By 2_i

The inefficiencies from tension being at an angle...

The inefficiencies from tension being at an angle to the cogs or rings tend to behave like (1-cosine(angle)). For small angles relative to straight on they are completely irrelevant.
Forum: Folding Bikes
08-01-20, 08:52 AM
Replies: 21
Views: 661
Posted By 2_i

The Litepro adapter for Birdy, that I am using,...

The Litepro adapter for Birdy, that I am using, has an angled stop, but still the angle is insufficient and the cable comes out at an significant angle and rubs. If the stop were farther away, the...
Forum: Folding Bikes
07-31-20, 04:30 PM
Replies: 21
Views: 661
Posted By 2_i

Thanks for pointing this one. Somehow when this...

Thanks for pointing this one. Somehow when this one is offered, it is only for local sale in Asia. Ridea seems mostly focused on motorcycle products and their marketing of bicycle products is spotty...
Forum: Folding Bikes
07-30-20, 01:34 PM
Replies: 26
Views: 822
Posted By 2_i

I am looking at the 3Sixty levers on AliExpress...

I am looking at the 3Sixty levers on AliExpress and they appear to be a literal copy of the levers on my 2016(?) Brompton. Am I missing something?
Forum: Folding Bikes
07-29-20, 09:22 PM
Replies: 21
Views: 661
Posted By 2_i

AliExpress, over here...

AliExpress, over here (https://www.aliexpress.com/item/32638769122.html?spm=a2g0s.9042311.0.0.172e4c4dIkgQoo).
07-29-20, 04:23 PM
Replies: 59
Views: 1,914
Posted By 2_i

For a short while I operated in a surrounding...

For a short while I operated in a surrounding where it was dark when going to work and dark again when going back. That was in northern Finland. I had no bike there, but most people around had and...
07-29-20, 06:52 AM
Replies: 30
Views: 1,468
Posted By 2_i

I just checked and interestingly they started...

I just checked and interestingly they started having at least an on-line US presence: www.decathlon.com/ (https://www.decathlon.com/) From the European experience, they have been for me a bit too...
Forum: Folding Bikes
07-28-20, 12:11 PM
Replies: 21
Views: 661
Posted By 2_i

The CM Wasson was OK, but it is not available in...

The CM Wasson was OK, but it is not available in the market and, on its own, given the awkward geometry of a folder, could work directly or not for a particular setup. In my memory I needed to...
Forum: Folding Bikes
07-28-20, 07:29 AM
Replies: 21
Views: 661
Posted By 2_i

Thanks :D. On the topic of the FD adapters I...

Thanks :D. On the topic of the FD adapters I started wondering why Brompton is ignored among adapter offerings from Asia. There are tons of other components offered for Brompton, but the adapters are...
Forum: Folding Bikes
07-27-20, 09:34 PM
Replies: 21
Views: 661
Posted By 2_i

This shallow hole is 5mm in diameter. The mount...

This shallow hole is 5mm in diameter. The mount cost me just $25, including S/H, and arrived in 3 weeks. The product is well more wholesome than any of the Litepro, but one of the latter might fit...
07-27-20, 02:38 PM
Replies: 59
Views: 1,914
Posted By 2_i

Percentagewise not many bikes in the US are used...

Percentagewise not many bikes in the US are used for commuting. If people commute they they tend to do that in fair weather and daylight. The whole scene for a while was slated towards bikes utilized...
Forum: Folding Bikes
07-27-20, 12:56 PM
Replies: 21
Views: 661
Posted By 2_i

It is larger, but that larger diameter extends...

It is larger, but that larger diameter extends over a shallow depth, just under 2mm, see the photo.

...
Forum: Folding Bikes
07-26-20, 03:32 PM
Replies: 21
Views: 661
Posted By 2_i

It is the hole going through the rail, right...

It is the hole going through the rail, right under the mounting point on the arm. The two sides of the hole are visible in the first two photos. The hole diameter just accommodates the cable. There...
Forum: Folding Bikes
07-26-20, 12:38 PM
Replies: 21
Views: 661
Posted By 2_i

Gineyea FD Adapter f/Folders

Folders often have a limited number of gears and commonly come with no front derailleurs. Yet if you take them around places, sooner or later you are likely to run into hills, even when there are no...
07-23-20, 07:49 AM
Replies: 180
Views: 7,394
Posted By 2_i

His joint article on relation of Q-value to...

His joint article on relation of Q-value to efficiency in BQ demonstrated the issue. They took old measurement data, from a thesis (?), that, within errors, showed no significant correlation between...
07-21-20, 11:56 AM
Replies: 30
Views: 1,158
Posted By 2_i

One surprising finding, when in China, is that...

One surprising finding, when in China, is that the public there commonly shies away from the Chinese products, expecting them to be of bad quality, not worth their money. When a Chinese company wants...
07-20-20, 07:35 PM
Replies: 30
Views: 1,158
Posted By 2_i

And some of us apparently mistakenly bite our...

And some of us apparently mistakenly bite our fingernails checking how particular helmets do in the Virginia Tech tests (https://helmet.beam.vt.edu/bicycle-helmet-ratings.html), before going ahead...
07-20-20, 06:28 PM
Replies: 30
Views: 1,158
Posted By 2_i

If I were buying on Ebay, I would have received a...

If I were buying on Ebay, I would have received a full refund for the bad handlebars I received, else the buyer would have needed to pay for shipping them back. On AliExpress I only got back half of...
07-20-20, 05:14 PM
Replies: 30
Views: 1,158
Posted By 2_i

The manufacturer's link to my handlebars is here...

The manufacturer's link to my handlebars is here (https://tibicycles.com/collections/titanium-parts-suit-for-brompton/products/titanium-brompton-m-handlebar). They are located in Baoji, "Titanium...
07-20-20, 04:27 PM
Replies: 30
Views: 1,158
Posted By 2_i

In the photo below are my handlebars, with those...

In the photo below are my handlebars, with those on top manufactured, to the best of my knowledge, by the said company next to Xian. In the bottom, for comparison, are OEM Brompton handlebars,...
Forum: Folding Bikes
07-19-20, 08:11 PM
Replies: 1,035
Views: 265,782
Posted By 2_i

No, I teach. However, I do meet physicians there....

No, I teach. However, I do meet physicians there. When they come to work in DRC they might often fly into Rwanda and go over the border to Goma. With DRC being in a well poorer shape, they might come...
07-18-20, 11:36 PM
Replies: 30
Views: 1,158
Posted By 2_i

I just bought Ti handlebars from AliExpress and...

I just bought Ti handlebars from AliExpress and the left side rose by 0.5" higher than right. I argued the case and my options were to get 50% of refund without sending the bars back or a full refund...
Forum: Folding Bikes
07-18-20, 03:41 PM
Replies: 41
Views: 5,296
Posted By 2_i

This has been such a traumatic experience, of a...

This has been such a traumatic experience, of a prolonged wait followed by a ridiculously blown balloon, that I will be taking a long break before trying any other product.

In the meantime, after...
Forum: Folding Bikes
07-18-20, 09:46 AM
Replies: 41
Views: 5,296
Posted By 2_i

Brompton: Titanium Handlebars --> Crooked

When looking for Ti replacement handlebars for Brompton, I wanted longevity there, anticipation that I would not need to replace them during the life of the bike. I was worried about strength in the...
Forum: Folding Bikes
07-11-20, 10:08 AM
Replies: 1,035
Views: 265,782
Posted By 2_i

As frequent, it is way better than the impression...

As frequent, it is way better than the impression you might get reading stories from outside. Still you must apply common sense. I usually start on the way conservative side and then gradually expand...
Forum: Folding Bikes
07-10-20, 08:38 PM
Replies: 1,035
Views: 265,782
Posted By 2_i

Thanks :). I was there to work, though, rather...

Thanks :). I was there to work, though, rather than tour and the time under my control was largely limited to that during weekends. With these limitations Brompton still turned out to be invaluable...
07-06-20, 10:24 PM
Replies: 42
Views: 7,740
Posted By 2_i

Some apps will not talk, if you set the ringer to...

Some apps will not talk, if you set the ringer to vibrate. Make sure that all audio channels are on.
Forum: Folding Bikes
07-05-20, 09:03 PM
Replies: 20
Views: 1,125
Posted By 2_i

I definitely remember some a figure from some...

I definitely remember some a figure from some technical research paper. The pull force should drop like cosine of the angle between subsequent links. Links are always a bit loose, even on a new...
Forum: Folding Bikes
07-05-20, 11:41 AM
Replies: 20
Views: 1,125
Posted By 2_i

The efficiency drops with cog size, particularly...

The efficiency drops with cog size, particularly quickly at the small size end, if anyone cares, as the pull force from a chain link is more and more misaligned with the usable pull force for the...
Forum: Folding Bikes
07-03-20, 06:17 PM
Replies: 15
Views: 1,219
Posted By 2_i

As a folding bike must accomplish more than a...

As a folding bike must accomplish more than a regular bike, there need to be compromises somewhere, such as fewer speeds, smaller wheels, getting subjectively less for the price, etc. For most people...
Forum: Folding Bikes
06-30-20, 01:09 PM
Replies: 42
Views: 3,700
Posted By 2_i

Looking on their website and elsewhere suggest...

Looking on their website and elsewhere suggest that Gineyea could be the manufacturer behind the Microshift brand. With this, the quality might be good. I put out an order for the sake of exploration.
Forum: Folding Bikes
06-29-20, 09:46 PM
Replies: 42
Views: 3,700
Posted By 2_i

While it might not be the choice for the present...

While it might not be the choice for the present situation, there is a new adapter entering the market, with an adjustable mounting angle:

https://www.aliexpress.com/item/32638769122.html
...
Forum: Folding Bikes
06-28-20, 03:40 PM
Replies: 42
Views: 3,700
Posted By 2_i

The tiny tab along the bottom of the finger is so...

The tiny tab along the bottom of the finger is so thin, that the twisting forces can shear it off. One photo below shows the outside of fingers bottom with the bends signifying the start of the...
Forum: Folding Bikes
06-26-20, 04:02 PM
Replies: 42
Views: 3,700
Posted By 2_i

Yeah, I already made the first washer with a lip...

Yeah, I already made the first washer with a lip as a ship and it limited the rotations, but it was too thin, so I will try a thicker sheet. Nonetheless a better design with 2 bolts would have been...
Forum: Folding Bikes
06-26-20, 02:19 PM
Replies: 42
Views: 3,700
Posted By 2_i

Uh, I just tried this new Litepro on Brompton and...

Uh, I just tried this new Litepro on Brompton and the finger of the adapter, secured with just one bolt, rotates uncontrollably under the forces common for derailleur operation. Yes, maybe one could...
06-22-20, 08:51 PM
Replies: 56
Views: 1,938
Posted By 2_i

Converting my meter development numbers to gear...

Converting my meter development numbers to gear inches, I get 1.06m=13" and 1.30m=16". I find 16" still usable when you actually need it, and 13" just for short periods, when 16" is not enough. As to...
06-22-20, 06:57 PM
Replies: 32
Views: 1,474
Posted By 2_i

There is no strain relief. They tend to be made...

There is no strain relief. They tend to be made for thicker wire than I would normally use on a bike. If you want to be able to replace components, the price seems to go up by an order of magnitude.
06-21-20, 09:27 PM
Replies: 56
Views: 1,938
Posted By 2_i

I borrowed the photo from another thread and it...

I borrowed the photo from another thread and it shows the type of vicinity where I work every once in a while. For this, I built up really low gears and the lowest one now gives 1.06m of development....
06-21-20, 06:04 PM
Replies: 32
Views: 1,474
Posted By 2_i

Sure, good advice. Here, there were other...

Sure, good advice. Here, there were other considerations, though. The two ends, where the connectors could be moved, were already overcrowded, so midway became a choice. Another, is that I ended up...
06-21-20, 02:24 PM
Replies: 32
Views: 1,474
Posted By 2_i

The holding force of those popular pins is quite...

The holding force of those popular pins is quite high when you try to separate them by hand, but I think that the problem is in the fact that when they start separating it just progresses in one...
06-21-20, 08:16 AM
Replies: 32
Views: 1,474
Posted By 2_i

When using similarly looking connectors on a...

When using similarly looking connectors on a bike, I ran into the problem of them slipping out of each other due to wire weight and vibration. There are similar connectors around with a ring spring...
06-20-20, 10:11 AM
Replies: 16
Views: 346
Posted By 2_i

I use pure water from a spray bottle, but water...

I use pure water from a spray bottle, but water from any container will work too. You just try to raise the grip from any side a bit and get any water in, then twist and move the respective edge of...
06-18-20, 09:16 PM
Replies: 32
Views: 1,474
Posted By 2_i

This...

This (https://support.newgatesimms.com/choosing-a-connector-lubricant/) has an overview of connector lubricants with NyoGel 760G...
06-15-20, 06:32 PM
Replies: 50
Views: 1,612
Posted By 2_i

You can break a 1/4" drive by hand - it is like a...

You can break a 1/4" drive by hand - it is like a relatively thin bolt. Considering that you might be interested in higher torques for larger bolts, I would go with a higher drive and use a coupler...
06-14-20, 10:00 PM
Replies: 9
Views: 484
Posted By 2_i

VP-Vice...

VP-Vice (https://www.amazon.com/VP-Components-VP-Vice-Pedals-Pack/dp/B006ZH1J5W) are excellent pedals, but do not accept reflectors.
06-13-20, 09:16 PM
Replies: 32
Views: 1,474
Posted By 2_i

After advice from RGMN on this forums, I apply...

After advice from RGMN on this forums, I apply Nyogel 760G (https://www.amazon.com/NyoGel-760G-Dielectric-Synthetic-Grease/dp/B07FD145CP) to all connections and life is good.
Showing results 1 to 50 of 1000
 


 
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