Tag: am

Capreo versus Dog

Went for a nice 50k ride yesterday, and when I was 10k from home, I approached a house with a long driveway. As I approached, I saw a young boy calling after his dog who had started to sprint down the driveway. As I passed the driveway, the dog was in full sprint, barking and agressive. He caught me, came close and made me think he was going to bite me at the ankles. I took some evasive action, upped my speed a bit, while the dog circled and came at me again.

Three times, he outsprinted me, barked like hell and made aggressive movements towards my ankles. I kept thinking "when is this dog going to get tired". I don't know if he got tired, or just bored, but when I finally left him behind my Polar CS200 heart rate monitor was at 101% and I was in the Shimano Capreo's 9 smallest tooth sprocket.

The Capreo freehub with it's 9-10-11-13-15-17-20-23-26 cassette is a godsend for small wheel bikes. With my 53/38 front chainring, it gives me approx 28-118 gear range on 20 inch tyres. The 118 inch top gear allows me to keep pedalling well beyond 50km/h, which is a great boost going downhill. The only other ways to achieve such a high gear on a Moulton is either use monster size chainrings (which I really dislike), or a Schlumpf Speed Drive. This is an expensive, but very nicely engineered internal planetary gear system that replaces your bottom bracket, and takes standard chainrings. I have seen one Pashley Moulton APB modified with a speed drive and double chainring, giving an amazing range of gears.

Moulton Summit 2007

Some pictures from the Moulton Summit 2007

Every year, Japanese Moulton owners take their lovingly restored and upgraded Moultons on a trip through that beautiful country. Alex Moulton Bicycles takes the event quite seriously too, with Shaun Moulton making the trip most years. I haven't found any reports on the event this year so I don't know if there was any product news or gossip!

This picture of another AM Speed S caught my eye...

... and again...

Not sure I'd buy the double pylon in this colour

eBay – the good, the bad and the ugly.

First, the good... check out eBay item 330132790082. I can't verify that it's genuine (though the frame number is clearly visible on the seat tube). If it is, it is quite rare indeed. The production of most Moulton frames was outsourced, but Alex Moulton employed the legendary Jack Lauterwasser to run the "S Works" which produced high spec, limited edition versions of several Moulton Models, such as the S Safari, the S Deluxe, and the very very rare S Speed.

The gorgeous and mysterious Moulton AM Speed S that was for sale on eBay and then disappeared, apparently appeared again last week, only to disappear again. I have heard it alleged that this is an attempt at a scam. The original listing several months ago was probably genuine and the bicycle probably has a very happy owner, However, a common scam on eBay is to clone a previous listing for an expensive item in the hope of swindling an unsuspecting buyer out of their hard earned cash.

There has also been a red Mark 3 (f-frame) on ebay several times over the last year or more. The seller has more than likely seen Mark 3 models going for high prices and is keen to cash in. The trouble is that he has been putting very high "Buy It Now" price tags on the bike. He started at about £500 and it has slowly dropped after several listings to about £250. But there have been no takers! Part of the problem is that he will not ship the bike abroad, so the buyer must pick it up.

Anyhow, a couple weeks ago it seemed that the buyer had learned something when he listed the bike for auction, with a 99p starting price and no reserve. Bidding started off slowly but with 4 days to go, the bidding went over £100. I thought that this bode well for the seller, as Moulton prices usually rise exponentially over that last few hours of the auction, so I thought he must be rubbing his hands. Not exactly... he posted an addition to the item, telling the bidders that they should stop wasting his time, and if the bidding didn't reach £200 he was going to withdraw it, which he duly did a few hours later.

Now, I have seen several Mark 3 models going for over £200, but in my view, the secret to getting high prices for Moultons on eBay is firstly to have a low starting price, to get lots of people interested. Then as the bidding heats up, they bid more than they sensibly should.

Secondly, if you want to sell rarer models for big money, you must be willing to ship abroad, and in particular to Japan. Buyers in Great Britain are a thrifty bunch, they know the values of each Moulton model and they know where they can get bargains. Additionally, there are lot and lots of Moultons that have been sitting in sheds for 30 years and they pop up at jumbles and in small advertisements all the time. The foreign buyer, however, has to try much harder to get his hands on a Moulton, and is usually more willing to bid more on eBay. And of course, patience is required. The most bidding occurs in the last few hours, so pulling it out with 3 days to go is very very silly indeed.

I was really keen to see how this bike was going to sell... looks like the saga is going to run on a little longer!

Pogostick Continentals and Vibrating New Series

I'm using Continental Grand Prixs on my APB. These roll very nicely and are very light, but I've had my fair share of problems with them.

Firstly, one burst during my commute about 2 years ago. I wasn't going very fast, the inflation pressure was about perfect, I hadn't hit a pothole, and I wasn't carrying a load when the sidewall on the rear tyre blew out.

I was tempted to ditch them there and then, but I thought it was a once off and that it would be a mistake to write off any product, especially a tyre, based on one possibly freak occurrence so I bought a replacement and a spare.

Then late last year, when I put them on my Rigida Xplorer rims I got a pogo stick effect due the tyres not making a near perfect circle. It affected both front and back and made the bike unrideable.

I spent hours trying to get the bead to sit correctly on the rim, without success.

I partially solved the problem when I discovered that a medium width rim tape had been used when the wheels were built when a narrow tape would have been more appropriate.

The rim tape sat under the bead in places and not in others contributing to the inconsistent diameter of the inflated tyre.

What finally made the ride bearable again was the old trick of smearing washing up liquid on the inside of the rim wall, to reduce the friction between the bead and the rim. The bead is then encouraged to move more evenly outwards as the tyre is inflated.

Now the engineer in me did take into consideration that maybe the rims were at fault. I did previously have these tyres on standard Pashley wheels without a pogo problem.
However I also had Schwalbe City Jets on the Rigidas without a problem. It's difficult to say with certainty without an extensive experiment, but while the rims may be a contributing factor, they are unlikely to be the whole of the problem. I must conclude that the tyres are at least part, if not all of the problem.

What has this got to do with the New Series?

Well, on the moultonbicycle list on yahoogroups, there has been talk of a mystery vibration that occurs with Contis on the New Series, that kicks in at around 33km/h.

Well today, while the APB was on the work stand, I noticed the pogo effect again when I spun the wheels. And I noticed that the whole bike started to vibrate significantly at a certain speed. I used the bike computer to ascertain that this happened between approx 34 kph and 44kph. I repeated the the test several times with the same result. I also spun the wheels up to 70 kph, steadied the bike on the stand, and allowed them to slow down, thus ruling out that my hand pedalling motion was inducing any vibration.

the result was the same... Extensive vibration started at 44 kph and stopped around 33.

So are pogo stick contis a problem for others? Are they the reason for vibrating New Series phenomenon?

Anyhow, I have made a commitment to Contis for the time being having a pretty unworn pair on the APB, and a spare pair in the shed. So I'm pretty determined to make them work for me, instead of me working for them as seems to be the case at times!

Koowho TSR Rack

I first discovered Koowho from Japan, when I saw a fellow Moultoneer with a beautiful day rack on his APB.

Now they have done it again, with this gorgeous rear rack for the TSR.

It's made from aluminium, and you have a choice of polished or painted. It's pretty pricey, even before you add in shipping from Japan and customs. But if you gotta have it, you gotta have it 🙂

There's also a front rack.