Search found 118 matches

by james-o
22 Jul 2020, 7:02pm
Forum: Bikes & Bits – Technical section
Topic: Maybe steel isn't so real.....
Replies: 153
Views: 6153

Re: Maybe steel isn't so real.....

Had a test run on a Genesis equilibrium disc which is as near in spec to the pinnacle Arkose R2 I ended up buying as it's possible to get. The Genesis was steel and twice the price of the aluminium pinnacle but I preferred the pinnacle with it's internal cable routing (even down the chain stays ) ....
by james-o
8 Jul 2020, 1:28pm
Forum: Bikes & Bits – Technical section
Topic: Maybe steel isn't so real.....
Replies: 153
Views: 6153

Re: Maybe steel isn't so real.....

Interesting OP and skim-read thread. This general point has come up in conversation a few times and one point I'd make is - yes, actual vertical compliance is within millimetres or less between frames. But what we feel as comfort in a bike mostly isn't coming from vertical compliance in the frame, i...
by james-o
8 Jul 2020, 1:02pm
Forum: Bikes & Bits – Technical section
Topic: USB outputs, USB-Werk and fault diagnosis - I'm stuck
Replies: 5
Views: 345

Re: USB outputs, USB-Werk and fault diagnosis - I'm stuck

Thanks for the input. I've got hold of a USB charge multimeter so will ride with that lined in and see what V and mAh out readings each unit gives me. The functioning unit is 6 years old and has had a lot of use w/o issues to I've not lost faith with the item itself, just interested to find what's g...
by james-o
1 Jul 2020, 4:25pm
Forum: Bikes & Bits – Technical section
Topic: USB outputs, USB-Werk and fault diagnosis - I'm stuck
Replies: 5
Views: 345

USB outputs, USB-Werk and fault diagnosis - I'm stuck

Difficult to do this remotely I'm sure, but through a process of elimination with 1 fully functional dynamo to USB-Werk system on one bike and 1 non-functioning replica system on another I wonder if the points below show something I'm missing. I have a multimeter but my electronics ability is basic,...
by james-o
7 Aug 2016, 9:19am
Forum: Bikes & Bits – Technical section
Topic: What is the "centre of steering"?
Replies: 34
Views: 1974

Re: What is the "centre of steering"?

One of Thorn's great admonitions against short stems is that they might put the rider's hands behind the "centre of steering" thus causing an uncontrollable wobble or shimmy. Only if the bike is inclined to shimmy in the first place. Colin's points are right re shimmy, I'd say. It's a res...
by james-o
7 Aug 2016, 8:57am
Forum: Bikes & Bits – Technical section
Topic: B&M 'USB-Werks" + Garmin 1000 + B&M IQ-X
Replies: 5
Views: 714

Re: B&M 'USB-Werks" + Garmin 1000 + B&M IQ-X

I have a USB-Werk and an SON front light with a Garmin 800, so a different set up but fwiw - the Garmin 800 has a 2000-2200mah batterey as far as I know. It charges in about 3hrs of ~14mph average pace road riding (estimate from experience rather than a calc. I then leave it plugged in mostly as onc...
by james-o
19 Mar 2016, 10:28am
Forum: Bikes & Bits – Technical section
Topic: FRAME STIFFNESS
Replies: 79
Views: 4554

Re: FRAME STIFFNESS

Colin, imo you're bob-on re the head tube, TT and DT shaping in your first post. We did the same things with 'XX44' head sets and head tubes when I 'designed' (I like your use of inverted commas there, I agree, most of us specify frames, design is a stretch and over-used in the industry imo) the Gen...
by james-o
21 Feb 2016, 11:32am
Forum: Bikes & Bits – Technical section
Topic: Carbon fibre disk brake touring fork
Replies: 41
Views: 2570

Re: Carbon fibre disk brake touring fork

I'd agree with a lot of that Brucey. Commuting on salty or oily roads can make a joke of a disc pad pretty fast, the main con vs the generally weaker but predictably so performance of rim brakes in the wet. I've never found discs an issue with upsetting my balance on the bike, the power's there but ...
by james-o
21 Feb 2016, 9:26am
Forum: Bikes & Bits – Technical section
Topic: Carbon fibre disk brake touring fork
Replies: 41
Views: 2570

Re: Carbon fibre disk brake touring fork

Disc brakes have their plusses and minuses, but for most of the winter there is no real benefit in terms of braking performance because that is limited by the grip of the tyre on the (wet, muddy, icy) road anyway. For someone with your technical experience I'm suprised to read that. That point has ...
by james-o
8 Sep 2015, 9:07am
Forum: Bikes & Bits – Technical section
Topic: 10 reasons to dislike drop/road bars :P
Replies: 123
Views: 10644

Re: 10 reasons to dislike drop/road bars :P

http://cdn2.bigcommerce.com/n-d57o0b/6jcqg/product_images/uploaded_images/hbar-positions-anim-v2.gif?t=1417710769 Jones 'H' bar. Very useful fore-aft position variation. Depending what gear shifter is used, I can cover the brake with my 2 outer fingers from a narrow+fwd position and from the rear i...
by james-o
6 Sep 2015, 10:08am
Forum: Bikes & Bits – Technical section
Topic: 10 reasons to dislike drop/road bars :P
Replies: 123
Views: 10644

Re: 10 reasons to dislike drop/road bars :P

Interesting topic. I love as well as hate drop bars. I love how they work on a ' proper' road bike yet I don't want to be limited to tarmac on my 'road' bike. I find drop bars challenging at best for riding off-road, at least any riding that's not pootling. I know John Tomac rode like a man posessed...
by james-o
27 Jun 2015, 4:59pm
Forum: Bikes & Bits – Technical section
Topic: Effect of bottom-bracket height
Replies: 17
Views: 3340

Re: Effect of bottom-bracket height

Yes 25 deg lean angle from the vertical, as the minimum lean angle. Should've clarified the 'minimum' bit : )
by james-o
27 Jun 2015, 1:24pm
Forum: Bikes & Bits – Technical section
Topic: Effect of bottom-bracket height
Replies: 17
Views: 3340

Re: Effect of bottom-bracket height

I think a higher bottom bracket and thus higher centre of gravity would make the bike feel more stable (the opposite of a car), much like a broom but not a pencil can be easily balanced on a finger. This is the idea behind the 14" plus BB on Geoff App's Cleland bikes. An amazingly agile bike a...
by james-o
21 May 2015, 6:55am
Forum: Touring & Expedition
Topic: Dirt road touring / bike-packing in Crete - info
Replies: 3
Views: 658

Re: Dirt road touring / bike-packing in Crete - info

Looks good .. I wondered what that area would be like for a trip a few year ago. Back on the list!
by james-o
21 May 2015, 6:49am
Forum: Bikes & Bits – Technical section
Topic: Recall Notices
Replies: 7
Views: 589

Re: Recall Notices

The Bicycle Association passes all recall notices to its members so the trade does get to hear of them. Perhaps a public-facing aspect of that would be good but to be fair they're simply passing info along, it's the manufacturer's responsibility for a reasonable means of contacting customers.