Search found 161 matches

by RJC
27 Mar 2021, 10:20am
Forum: Bikes & Bits – Technical section
Topic: Best wishes for Brucey
Replies: 422
Views: 27372

Re: Best wishes for Brucey

Keeping fingers crossed for Brucey's recovery. Whenever an interesting question came along my first thoughts were usually 'What will Brucey make of this'. I'll contribute if any financial support is useful.

Cheers,
Robin
(in Bristol)
by RJC
13 Feb 2021, 12:57pm
Forum: Bikes & Bits – Technical section
Topic: Adding Disc Mounts
Replies: 64
Views: 1807

Re: Adding Disc Mounts

Si wrote:
djnotts wrote:
Si wrote:Hydraulic rim brakes. Best/worst* of both worlds.

* Delete according to you personal bias.


One system I have never tried, but always suspected "worst". The faff of hydraulics while still grinding rims!


I've tried two bikes with them. On one the brakes were as good as a hydraulic disc. On the other, despite being powerful enough to bend the fork, the stopping power was no better than a canti......no doubt pad issues.


Brake boosters worthwhile with these IMO. Without cable stretch then other flex is going to be more apparent. Also you don't have the cables pulling in the opposite direction like on V-brakes.
As well as being powerful and precise another nice feature is that the brake blocks move perpendicular to the rims so once set up they can score well on lack of faff.
But the drop bar lever version HS66 is no longer available so this might be a bit hypothetical for the OP.
by RJC
1 Feb 2021, 3:38pm
Forum: Bikes & Bits – Technical section
Topic: semi fluid grease eg carlube 100+
Replies: 18
Views: 805

Re: semi fluid grease eg carlube 100+

pwu wrote:I bought some the the other day. I used it in some m780 shifters, no change in sound but it certainly reaches everywhere. It comes out as a heavy oil and after the bubbles disappear it settles into a fine sticky to the touch but at the same time slippery film layer.


Would it be too sticky for freehub pawls?
by RJC
24 Jan 2021, 11:20pm
Forum: Bikes & Bits – Technical section
Topic: Mudguard screws sheared off and embedded in frame
Replies: 76
Views: 2812

Re: Mudguard screws sheared off and embedded in frame

Aluminium alloy has >2x the coefficient of thermal expansion compared to titanium so on a cold night the bolt could be under extra stress.
by RJC
14 Jan 2021, 4:41pm
Forum: Bikes & Bits – Technical section
Topic: Hub Generators; reactive loading puts new slant on efficiency claims.
Replies: 31
Views: 1659

Re: Hub Generators; reactive loading puts new slant on efficiency claims.

I think the German bicycle light regs do now allow a switchable high beam mode. There don't seem to be many dynamo lights with that feature at the moment, but I haven't done a proper search.
by RJC
30 Dec 2020, 3:15am
Forum: Bikes & Bits – Technical section
Topic: Union-Marwi UN-4276; best of low price dynamo lights?
Replies: 26
Views: 1093

Re: Union-Marwi UN-4276; best of low price dynamo lights?

Note that with the first light (and possibly the second) the tags for the connecting wire for the rear light are directly soldered onto a pcb inside the light, so you need the prevent the wires from moving, e.g. cable tie to the bracket, or the solder joints will eventually crack.
by RJC
6 Dec 2020, 10:56pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Alfine 11 - Longer term reliability
Replies: 830
Views: 176662

Re: Shimano Alfine 11 - Longer term reliability

severs1966 wrote:
RJC wrote:
severs1966 wrote:


Just to be clear - your friend did some tests on samples of these oils?


Yes, It was arranged between a number of us that run IGHs as we sought a supply of oil that isn't expensive. He works for a company I can't name, that moreor less tests commercially available "fancy" oils and then markets copies to companies that buy in bulk. He works for a company that has a manufacturing plant on Humberside. His workplace is full of chromatographs and other sexy machinery.


Any results from these test would be of interest. It will probably mostly mean nothing to me but I expect there will be others who understand these things.
by RJC
6 Dec 2020, 3:57pm
Forum: Bikes & Bits – Technical section
Topic: Shimano Alfine 11 - Longer term reliability
Replies: 830
Views: 176662

Re: Shimano Alfine 11 - Longer term reliability

severs1966 wrote:
zeluzel wrote:He told me a lot of stuff, but i didn't understand it all. I'm not a chemist. The message did seem to be that both genuine Rohloff oil and genuine Shimano oil is much less exotic than they would like you to believe.


Just to be clear - your friend did some tests on samples of these oils?
by RJC
5 Nov 2020, 2:05pm
Forum: Bikes & Bits – Technical section
Topic: Measuring Caliper recommendation
Replies: 45
Views: 1507

Re: Measuring Caliper recommendation

I had better luck in terms of battery life with an Lidl Powerfix caliper that takes a CR2032 battery compared to a couple of previous ones from other suppliers that took LR44 batteries. I'm still on the first or second battery for the Lidl unit but the other ones could flatten a battery within a year if left in place. My Lidl caliper is a few years old* now so I can't vouch for more recent ones.
*I don't have the receipt but instructions dated 2007
by RJC
21 Jul 2020, 2:27pm
Forum: Bikes & Bits – Technical section
Topic: Alan millyard bicycle
Replies: 6
Views: 374

Re: Alan millyard bicycle

Welded 7075-T6. Not sure what to make of that but apparently still working.
by RJC
9 Jun 2020, 12:19pm
Forum: Bikes & Bits – Technical section
Topic: Cable/Hydraulic discs TRP-HY-RD Woes
Replies: 33
Views: 10789

Re: Cable/Hydraulic discs TRP-HY-RD Woes

I don't know if this is useful but it looks like there is also another possible place to bleed the caliper on the back.
I'm guessing the screw is there to fill a hole created in the construction.
by RJC
3 May 2020, 6:55pm
Forum: Bikes & Bits – Technical section
Topic: Lost quick release key
Replies: 6
Views: 301

Re: Lost quick release key

Looks like this: https://www.sjscycles.co.uk/hub-spares/transx-replacement-special-key-for-antitheft-sets/

Alternatively you can buy a set for ~£11-15 e.g https://www.amazon.co.uk/ETC-Front-Skewer-Triple-Locking/dp/B001C5PG8I/ref=cts_sp_3_vtp
There are two versions of the set, 130mm or 135mm rear skewer.

One flaw with the skewer is that it is probably possible to turn the nut side by grabbing it with pliers.
The Halo allen key skewers have an anti-turn tab on the nut which can be used to replace the TransX/ETC nut.
by RJC
4 Feb 2020, 1:04pm
Forum: Does anyone know … ?
Topic: Toolkit pliers?
Replies: 49
Views: 2195

Re: Toolkit pliers?

slowster wrote:As a general purpose tool I like the Knipex Pliers Wrench. The 150mm size is much heavier (170g) than some of the lightweight multi-tools, but it is a much more useful tool:
...


If you are in Reading, Clas Ohlson sell 150mm Pliers Wrench for £30 https://www.clasohlson.com/uk/Knipex-Pliers-Wrench/p/Pr409448000
by RJC
11 Dec 2019, 11:23am
Forum: Bikes & Bits – Technical section
Topic: Frameset transplant: Spa Titanium Touring
Replies: 89
Views: 3908

Re: Frameset transplant: Spa Titanium Touring

Did you consider attaching the front mudguard stays to the next eyelet up on the forks?
Both stays will be shorter so a bit stiffer.
Also if a stick or something catches under the mudguard it will tend to pull away from the tyre rather than towards.