Search found 170 matches

by Sum
30 May 2020, 9:08am
Forum: Does anyone know … ?
Topic: Gearing ratios
Replies: 28
Views: 1204

Re: Gearing ratios

Why? The difference between the rings will not exceed 16t(50/34 to 48/32) so I’ll just lower the front mech accordingly.As long as the front mech is at the correct height it will be fine. Because if your 50/34 chainset is a compact then the BCD should be 110mm, which limits the smallest chainring t...
by Sum
28 May 2020, 1:01pm
Forum: Bikes & Bits – Technical section
Topic: 622 2" tube?
Replies: 4
Views: 216

Re: 622 2" tube?

You will need a 29er MTB tyre, like these:
https://www.chainreactioncycles.com/tubes?f=4294957821

NB There may be cheaper ones available elsewhere.

Edited to link to a better example.
by Sum
25 May 2020, 1:23pm
Forum: Does anyone know … ?
Topic: AVID BB7 MTN
Replies: 8
Views: 281

Re: AVID BB7 MTN

In case you're still looking for a parts diagram, there's an exploded diagram in one of Brucey's old posts: https://forum.cyclinguk.org/viewtopic.php?t=118495#p1180944 . Scroll down past BB5 diagram to get to the BB7. NB There are variations with date of manufacture. Note that on the +2008 caliper m...
by Sum
19 Apr 2020, 8:16am
Forum: Does anyone know … ?
Topic: Cycling as an activity during the Covid 19 outbreak
Replies: 1057
Views: 34150

Re: Cycling as an activity during the Covid 19 outbreak

Awww! The mods been at it again with the deleting of the posts. The trouble is, I'm now wondering what entertainment have I missed!? :lol:
by Sum
18 Apr 2020, 5:07pm
Forum: Does anyone know … ?
Topic: Cycling as an activity during the Covid 19 outbreak
Replies: 1057
Views: 34150

Re: Cycling as an activity during the Covid 19 outbreak

I wonder if Cowsham is referring to this paper " Social Distancing v2.0: During Walking, Running and Cycling ". The paper has been criticised for being published before being peer reviewed, as reported by the Independent . Here's a summary lifted from the Independent: Analysis of exhaled d...
by Sum
14 Apr 2020, 7:35am
Forum: Does anyone know … ?
Topic: Cycling as an activity during the Covid 19 outbreak
Replies: 1057
Views: 34150

Re: Cycling as an activity during the Covid 19 outbreak

Thank you. Still doesn't answer my question. Still doesn't answer how many people constitute a gathering. Restrictions on gatherings 7. During the emergency period, no person may participate in a gathering in a public place of more than two people except— (a) where all the persons in the gathering ...
by Sum
22 Mar 2020, 4:18pm
Forum: Does anyone know … ?
Topic: Midlands Velo cancelled
Replies: 16
Views: 902

Re: Midlands Velo cancelled

Under £100 can be refunded under the Chargeback scheme (although it doesn't offer the same level of protection as Section 75). https://www.moneysavingexpert.com/shopping/visa-mastercard-chargeback/ That said according to the Velo Birmingham, the Terms & Conditions of participation allow them to ...
by Sum
9 Nov 2019, 10:41am
Forum: Bikes & Bits – Technical section
Topic: 2.4W dynamo hubs
Replies: 72
Views: 2603

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: 4693

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: 4693

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: 724

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: 724

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: 4693

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: 1378

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: 1365

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...