Search found 163 matches

by Sum
9 Nov 2019, 10:41am
Forum: Bikes & Bits – Technical section
Topic: 2.4W dynamo hubs
Replies: 72
Views: 2473

Re: 2.4W dynamo hubs

there has to be something limiting the voltage in your open circuit tests NO, there's nothing, only when I connect some resistive load the the waveform becomes a little bit smoother. Page 18 of Magdowski's 'Modeling a hub dynamo' (NB a very rough English translation here but you will need to scroll...
by Sum
7 Nov 2019, 7:31pm
Forum: On the road
Topic: What's the legal position?
Replies: 72
Views: 4056

Re: What's the legal position?

No, we don't really know that much about the OP's situation to confidently say that it is identical to your hypothetical situation. We do know however that the GMP and the driver consider the driver/himself to be at fault, which differs from your view, and suggests we may not have all the facts to m...
by Sum
6 Nov 2019, 7:42pm
Forum: On the road
Topic: What's the legal position?
Replies: 72
Views: 4056

Re: What's the legal position?

Pete Owens wrote:Again, imagine a situation ...

I'm not quite certain what this has to do with the OP's situation. Is this simply a case of thread drift where you are arguing an interesting but hypothetical situation?
by Sum
1 Nov 2019, 9:08pm
Forum: Bikes & Bits – Technical section
Topic: Reduce Shimano REAR rotor size from 160mm to 140mm
Replies: 7
Views: 486

Re: Reduce Shimano REAR rotor size from 160mm to 140mm

There are different bolt lengths available (item 24 in the exploded view):- https://si.shimano.com/pdfs/ev/EV-BR-R9170-4074B.pdf But the ones you have should already be of the right length if they worked with the 160mm adapter. After removing the adapter you simply refit them without the washers, an...
by Sum
1 Nov 2019, 8:44pm
Forum: Bikes & Bits – Technical section
Topic: Reduce Shimano REAR rotor size from 160mm to 140mm
Replies: 7
Views: 486

Re: Reduce Shimano REAR rotor size from 160mm to 140mm

You may need different length bolts according to the manual:-
https://si.shimano.com/pdfs/dm/DM-RADBR01-06-ENG.pdf#page=46

Edit: But maybe not - it appears you simply omit the washers when refitting the "Brake caliper mounting bolt C"?
by Sum
29 Oct 2019, 9:17pm
Forum: On the road
Topic: What's the legal position?
Replies: 72
Views: 4056

Re: What's the legal position?

Just got home from A&E; broken patella, bruised ribs, skinned knee, skinned elbow, glued up head wound, cracked helmet, buckled wheel and suspect carbon forks. Van left hooked me as I was going on the inside of slow moving traffic, I don't think he signalled. Police and ambulance arrived and I ...
by Sum
14 Oct 2019, 8:19pm
Forum: Does anyone know … ?
Topic: Going Tubeless - What Size Tape??
Replies: 16
Views: 761

Re: Going Tubeless - What Size Tape??

How do I know what size tape I need to convert to tubeless ... The rim tape needs to be wide enough to amply cover the spoke holes but not so wide it won't fit inside the rim. The rim tape usually stretches a little and so you can get away with a rim tape a little bit wider than the rim, or you can...
by Sum
13 Oct 2019, 7:33pm
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 1268

Re: Marathon Plus or Marathon Tour?

Thanks for that! Had a long trawl through all their bumpf before deciding. Had a selection of their tyres over the years, and its amazing how much they vary. Definitely made the right choice, with these - apart from being a slightly more ‘knobbly’ tread, running them on the lower end of the pressur...
by Sum
13 Oct 2019, 4:17pm
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 1268

Re: Marathon Plus or Marathon Tour?

well the picture seems to show none? https://www.schwalbe.com/en/tour-reader/marathon-plus-tour hard to see with those side nobbles it could have one? The picture you linked to is a cutaway illustration and not a photo. Here's a better image from the Chain Reaction Cycles website:- https://media.ch...
by Sum
13 Oct 2019, 1:42pm
Forum: Does anyone know … ?
Topic: Marathon Plus or Marathon Tour?
Replies: 28
Views: 1268

Re: Marathon Plus or Marathon Tour?

One difference I see is the the Tour dont have a bottle dyno track where as the Plus does, and Schwalbe claim the Tour is better off road? Interestingly they say the standard marathon has better off road performance than the Plus one. Has any one used the Tour version? The HS-404 Marathon Plus Tour...
by Sum
12 Oct 2019, 6:46pm
Forum: Bikes & Bits – Technical section
Topic: Front derailleur capabilities - source?
Replies: 17
Views: 579

Re: Front derailleur capabilities - source?

I went to the web page linked, and saw: "The SHIMANO SORA R3030 front derailleur is compatible with wide ratio, 3x9 speed gear combinations." That's about it. No mention of tooth counts, maximum, minimum or gap. You have to click on the little down arrow to expand the table:- MODEL NO FD-...
by Sum
20 Jul 2019, 9:07pm
Forum: Helmets sub-forum
Topic: Helmets?
Replies: 116
Views: 6524

Re: Helmets?

I don't think the OP had assumed they needed to wear a helmet but in any case you may rest assured you've made your point clear.
by Sum
22 Apr 2019, 6:41pm
Forum: Bikes & Bits – Technical section
Topic: voodoo Aizan - fork replacement
Replies: 8
Views: 321

Re: voodoo Aizan - fork replacement

There are rigid forks for 29er MTBs but the choice seems limited, particularly if you don't want to (as you say) 'fork' out. According to the specs for your bike, you will need one with a 1 1/8" steer tube, QR drop outs, and a crown-to-axle height equivalent to your 120mm suspension fork (after...
by Sum
17 Feb 2019, 4:59pm
Forum: Bikes & Bits – Technical section
Topic: What tyres (possible unicorn content)?
Replies: 14
Views: 1560

Re: What tyres (possible unicorn content)?

SJS Cycles do sell a folding version of the Pasela TourGuard. Brucey provided a link to them in an earlier post.
by Sum
13 Feb 2019, 9:33pm
Forum: On the road
Topic: Went for a ride
Replies: 26
Views: 6390

Re: Went for a ride

Sheffield?