Showing posts with label Bikes. Show all posts
Showing posts with label Bikes. Show all posts

Thursday, February 11, 2021

Brompton Accessories #25 - EZ Hinge Clamp Spring

You are at - Jotaro's Blog / AhPek Biker / Bikes & Accessories / Brompton Accessories #25 - EZ Hinge Clamp Spring
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BROMPTON ACCESSORIES #25 -
EZ Hinge Clamp Spring

Many don't realize it, but for the Brompton bicycle the hinge clamps is one of the most important part of the bicycle. It's that part that screws in and clamps the hinged part of the bicycle together - one at the main horizontal post and the other at the handle bar vertical post. Without these two clamps to lock the hinged parts together, it is impossible to ride the bike. I once had a nasty fall just because I failed to to tighten one of the clamps adequately!
Some, having lost their clamps, had tried to lash the hinged parts together - but often these are futile efforts that may last only for a short while. The thing about these clamps is that when loosened they tend to run out from their required vertical or horizontal positions, and also have a tendency to rotate while tightening, thus slows down the screwing process.

Some third-party suppliers have come out with ingenious accessories that solves this problems and keep the clamps always at the required position. One such accessory is the Titanium Hinge Clamps from Brompfication. It's a beautiful piece of engineering with spring loaded screws, and clamps that has one side shorter - the spring maintain the clamp at the required parallel alignment with the hinge, with the long side lock into position to keep it vertical, while the shorter clamp is just away from the bike stem to allow folding. and keeps the clamp at just the right position so that minimum screwing in is required (about 5 to 7 turns) to tighten the clamp. For more details see this blog.
The thing about these titanium clamps is that they need some effort to bolt them in at the correct position using a nut on the inner side of the tube. I often keep my spare tube in the main horizontal post and this bolt interferes with inserting and withdrawing of the tube. Also I often travel by air with my Brompton, and before packing the Brompton for air travel,it is always wiser to dismantle the hinge clamps so that they are not damaged by poor baggage handling. And the effort and time to dismantle and re-assemble these titanium clamps in place correctly is often frustrating, especially if some friends are waiting to set off. With my frequent air travel, it came to a point that, I just forgot about using them and went back to the Brompton stock clamps!

So I had resolved myself to happily (in ignorance bliss, that is) fiddling with, and adjusting the clamps as I screwed them in and out at a speed that will not win any records for sure!
Then of late, these little gizmos kept on being posted on the net. These tiny things, having the profile shape like the Green Lantern's lantern, are 3-D printed polyurethane widgets that will help maintain the clamp in the correct position. It's a light (1 gram) widget, with two thick stub ends connected by two arms. Made with thermoplastic polyurethane (PU), it's durable and surprisingly can take hard knocks (as can be seen in the videos from the supplier at the bottom of this blog).
It's such a simple and very affordable item, one would have thought why it had not been made much earlier. These PU hinge clamp spring were designed and made by Steve Woods, who goes by the name of Gyrobot. As he puts it, he is "a full time Design Engineer, with many years of design experience in the following industries, Automotive, Aerospace, Nuclear Fusion and is now currently designing Bionic Arms for Open Bionics. By night, he is a maker, breaker, fixer and tinkerer of all things going by the alias Gyrobot. I am passionate about Engineering. I am the director of Gyrobot Ltd."
He is a generous chap, allowing people to 3D print this for themselves, or for others for free (non-commercial). And have designed and gifted this CAD model freely for this purpose only. It will be good to support him by getting it direct from him at his Buy Page; after all each of this clamp only cost £3.95, way much cheaper that many other designs in the market.

These EZ Hinge Clamp Springs comes in three colors - black white and red - and are super-easy to install and take out: just what I need for my air-travel with my bike. I got the red-colour ones as they are conspicuous to notice when taken out and won't get misplaced easily.

They are so easy to install when compared to other designs, just slot them in over the clamp screws before screwing back the clamps. Simple isn't it, even a techno-nerd (like the missus) won't get it wrong 😅. As can be seen above, the two stubs (with one at the hinge side and the other at the a clamp plate channel) keep the clamp in the required position. The two legs, which can take a fair amount of torsion keeps the two stubs parallel.

After that, just screw the clamps in until they are just in a "ready position" for folding and unfolding of the hinges. Photo above shows top view.

An isometric view of the same "ready position" shows the legs of the hinge spring in a semi-compressed state. From this position, it just takes another 5-7 turns to lock the hinge plates together.

Another photo shows the hinge spring in a fully compressed state, with the clamp fully screwed in.
Note: the above photos which only shows one hinge plate is for illustration purpose.

This photo shows the hinge plate clamped together, the PU hinge spring is inside and is not noticeable and does not hamper the clamping process.

Another photo of the EZ spring in the "Ready" position. These PU springs are surprisingly strong, super resilient and takes torsion well as can be seen in the following videos further below.

Another view of the fully compressed PU EZ clamp spring.
For more details & to purchase click on the following link: https://ezclamp.co.uk

 
Video showing the flexibility of the PU clamp spring and how well it takes torsion.


Video showing the strength of the PU clamp spring and how well it can take "hard knocks" even when whacked with a hammer!

Video showing the compressiblity of the PU clamp spring and how fast it elastically reverts back into its original shape.
Even if over time, the widget does get twisted/compressed out of shape, the can be "refreshed" by just dunking them into boiling water!
All these tests are good; but how will the PU plastic withstand degradation under the hot tropical weather here. We will see and I will get back on this after using it, several months down the road.
___________________________________________________________________________________

Related Blogs :

Brompton Accessories #12 : Titanium Hinge Clamps
An efficient and beautiful looking clamp.



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Brompton Accessories #14 : Mini-O Bag Packing Light & Tight









Graffiti Street Art @ Kuala Lumpur AKLEH Storm Drains #3 : September 2020
More of the large mural street art graffiti at the Klang River AKLEH storm drains of Kuala Lumpur.





You are at - Jotaro's Blog / AhPek Biker / Bikes & Accessories / Brompton Accessories #25 - EZ Hinge Clamp Spring
If you like this, view my other blogs at Jotaro's Blog
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Thursday, November 28, 2019

AhPek Biker One Million Pageviews

You are at - Jotaro's Blog / AhPek Biker / One Million Pageviews
                                     AhPek Biker - Riding Adventures                                   

1,000,000 Pageviews!


     Quietly, while I was away in Spain on a bike tour of the Iberian Peninsula, the pageviews of the AhPek Biker blogs quietly crept pass the ONE MILLION PAGEVIEWS MARK!

One million is a finite number, but it's still a large number not easy to count up to, one will neen the help of many fingers! And to hit the 1M mark is not easy and I have much to thank my readers & supporters. I do hope that my blogs have entertained them and perhaps helped some of them in one way or another.

It took me 7-1/2 years to achieve this million mark, this translate to about 370 people reading my blogs each day OR it also means that every 4 minutes a somebody, somewhere in the world in reading my blog and connecting to me.
Well, I guess that not a bad achievement... should I pat myself in the back... or better still go buy another bike!

Anyway, many thanks for all your support.... Cheerio!


You are at - Jotaro's Blog / AhPek Biker / One Million Pageviews
If you like this, view my other blogs at Jotaro's Blog
(comments most welcomed below. if you like this pls share via facebook or twitter)

Monday, June 19, 2017

Brompton 2017 Model Review - Buying My 3rd Brompton

You are at - Jotaro's Blog / AhPek Biker / Bikes & Accessories / Brompton 2017 Model Review - Buying My 3rd Brompton
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BROMPTON 2017 MODEL REVIEW - BUYING MY 3RD BROMPTON
(Disclaimer - all prices mentioned are approximate prices and rounded up. For more accurate pricing please contact the relevant people. All opinions expressed are my own based on my riding expereince, and on my 3rd Brompton)
One fine May day, I got a call from Vans Urban. It's a call that made me an offer that I found hard to refuse. They were having some 2017 Bromptons coming in at a reduced price; it was a batch of limited units only; so decisions had to be made fast. I wanted a P6R but they only had two colours available - gray and red. I had alway thought that the Red was more for ladies (Haha... this old man is a bit of a male chauvinist) BUT grey wasn't one of my favourite colour; so Red it is then!
And within a few days I confirmed my order.... no deposits required, just my honourable word (see, it's good to be friendly with people).

AND when I went to collect the bike.... I was in for a surprise.
The red was a new red, it was a BRIGHT FERRARI RED; a very masculine red that will bring out the macho manliness in most guys.
IT WAS LOVE AT FIRST SIGHT!
(and new love don't come easy for a person of my age 😎😎😎)

Okay, enough of the ramblings; let's have a look at the bike:
The first thing that caught my eyes were the gear shifters. Gone are the rabbit ears that stuck out conspicously above the handle. The new shifters were below the handle bar, giving the bike a clean, sleek look.
Like the 2016 model, the ring brackets neatly terminates the foam handle grips, thus also give some protection to the grip ends. The difference here being that the ring brackets not only hold the brake levers but also the shifters; so there is not separate brackets making things all the more neater.
At the front of the right shifter, almost un-noticeable, is a small bell which we will come to later.

Now for a bit of pros and cons.
PRO: The shifter works smoothly, just a small click and the gear changes. The levers work the same way, shift outwards away from center mean going into a lower gear.
CON (or could be PRO if one likes everything neat): The shifter lever springs back to centre position, so one cannot see which gear the bike is in just by sighting the levers (unlike the rabbit ears of old).

No worries though, there are indicating numbers on the right shifter stating which gear the bike is in for the hub gear. On the left, there are "+" and "-" signs to show high and low gear. This works well during the day, but at night the numbers could not be seen.
A suggestion here, perhaps instead of numbers use bright green, amber and red colour bands (luminous if possilble) as colours are easier to see and differentiate.

The small bell (about an inch across) will be the major source of complains.

A plastic spring striker with a metal stud at one end strikes the bell. The ring is slightly high pitch and resonate for a short while, BUT it is too soft and traffic ambient noise will probably drown it out.
Perhaps I will try to add a washer on the inside and see whether that helps.

The intergrated brake lever and shifter set up, looks cool especially with the folding Brompton icons.

The front crank is similar to the 2016 model; and is bolted to five radial arms. This make changing to cranks of different size very, very much easier.

Another GROOVY feature - the new rack which is of a more streamlined design and have recessed grooves in which the bungee cords can neatly run into.

See? I like this, for the older models I frequently put the cords below the rack so that they won't rub against the ground when pushing the folded Brompton. Now there is no necessity to fiddle with the cords this way.

This photo shows how neatly the cords fit into the grooves, staying clear of the ground.

Also the newer Eazy wheels are larger thus giving an added clearance of 2-3mm.

This plastic wrap round the bottom of the rear triangle is located where the nylon hook fits onto the frame. No more scatches here!

Like later models, the 2017 folding hinge does not over-fold and hit the main horizontal tube.

The pedal of my 2012 model, shows this overfold that can happen at certain angles.

Now for some basic mods:
A black Brooks B17 Special leather seats that comes with brass studs.
(Notice the Brompton logo at the top of seat post 😁)

The seat was installed with a slight tilt downwards, this will help reduce crotch pain on long rides.

A Kamoya suspension block to replace the stock FIRM block.

A strip of hi-tech looking carbon tape stuck onto the main horizontal tube to prevent scrathes when mounting or dismounting.

Other accessories which I got from My Bicycle Shop:
A Cat Eye rear light with screw type holding brackets. This was mounted under the seat.

Swivel-able round rear mirror, with elastic rubber strap and screw down lock-in.

Maching red rear side of the mirror.

A Minoura kick-stand, with matching red padded restrain.

The Minoura kick-stand in a folded up position. The red padding with black (cable-tie) strips looks great.

And now for some personalisation:
A striking "Thundercat" logo at the front of the horizontal tube.

Name stickers which also shows the Jalur Gemilang, the national flag of Malaysia.
The flag comes in handy when on overseas tours.
The sticker is put at a position to prevent cable scratch.

:"Brompton" decals on the handle post, also at a position to prevent cable scratch.

LOOKING GOOD!
The bright red is really striking and stands out even in front of a rubble wall...

..... or a planter box ....


..... at the predestrian bridge over the Klang River in Klang Town.

We are a good match the "Red Baron" and me 😈.

My stable of Brompton bicycles... it's one happy family.


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You are at - Jotaro's Blog / AhPek Biker / Bikes & Accessories / Brompton 2017 Model Review - Buying My 3rd Brompton

If you like this, view my other blogs at Jotaro's Blog
(comments most welcomed below. if you like this pls share via facebook or twitter)