Search found 153 matches

by hayers
31 Mar 2023, 6:08pm
Forum: On the road
Topic: "Inside Britain's biggest sewer under London's River Thames"
Replies: 4
Views: 1102

Re: "Inside Britain's biggest sewer under London's River Thames"

The minimum speed would be where the centrifugal force given by mv^2/r (m=mass, v= speed, r is radius) balances the weight given by mg (g is acceleration due to gravity)

Rearranging the min speed vmin = sqrt(gr)

Taking the radius as 2.5m snd g=9.8m/s2 gives 4.9m/s or 18km/hr.

Would need to be faster than that to maintain grip at the top of the loop.
by hayers
27 Nov 2021, 1:54pm
Forum: Touring & Expedition
Topic: Is it too soon to be planning for 2022?
Replies: 22
Views: 1767

Re: Is it too soon to be planning for 2022?

Not sure if clear enough to read but here's the map
by hayers
27 Nov 2021, 1:54pm
Forum: Touring & Expedition
Topic: Is it too soon to be planning for 2022?
Replies: 22
Views: 1767

Re: Is it too soon to be planning for 2022?

Quite a bit of jnfo here: https://avoncycleway.co.uk/ and there's also a facebook group.

I've got a paper map that I picked up in the library years ago, but not sure if it's still available anywhere.

It's a good ride - but the bit near the airport between a370 and a38 is a bit rat runny so best to avoid being on that bit in rush hours.
by hayers
26 Nov 2021, 10:24am
Forum: Touring & Expedition
Topic: Is it too soon to be planning for 2022?
Replies: 22
Views: 1767

Re: Is it too soon to be planning for 2022?

Redvee wrote: 25 Nov 2021, 1:34am I've got some rides planned that I haven't felt able to do in the last two years, one ride is the Avon Cycleway and the other is Bristol to Shaftesbury and back via a certain cobbled hill.
Sadly IIRC Gold Hill has got no cycling signs so recreating the hovis ad might be off... but nonetheless that will be a very nice ride, in fact am currently planning a multiday tour from S Glos with overnight in Shaftsbury having passed through on a previous route.
by hayers
5 Sep 2021, 8:48am
Forum: Bikes & Bits – Technical section
Topic: Peddling has become so hard with much vibration
Replies: 33
Views: 1982

Re: Peddling has become so hard with much vibration

Devz wrote: 4 Sep 2021, 5:22pm This does make sense to me, how about you guys? Thing is, I’m worried about cleaning it every night, as wouldn’t water make it worse? Any help on a quick daily cleanse would be awesome
Yes. Rather than washing, just brush / wipe the sand off with a rag. When oiling, let the oil wick into the chain bearings for a while (overnight if possible) then wipe the chain as dry as possible before riding. Oil is needed where the links pivot - not on the visible surfaces where it will attract sand and grit as the shop say.
by hayers
20 Jul 2021, 8:16pm
Forum: Bikes & Bits – Technical section
Topic: Bespoke wheel?
Replies: 9
Views: 477

Re: Bespoke wheel?

As a design, it seems a flaw that if one spoke breaks or loses tension then the second, nearby, spoke it's entwined with will also be un-tensioned, doubling the resulting runout.

As a visual effect, very striking though! Thanks for sharing.
by hayers
30 Jun 2021, 4:00pm
Forum: Bikes & Bits – Technical section
Topic: Map case repair
Replies: 14
Views: 1024

Re: Map case repair

I used some "fantastic elastic flexible glue" off Amazon for just that job about a year ago and still holding strong.

Was a bit disappointed my expensive ortleib map holder needed it after only 5 or 6 years...
by hayers
7 Jun 2021, 7:16pm
Forum: Bikes & Bits – Technical section
Topic: Headset Press Disaster
Replies: 36
Views: 2313

Re: Headset Press Disaster

If you dismantle the press so far as possible, can you tap one or both heads to then use studding or long bolt to jack the two ends apart? One will pop our first, then knock the second out with a drift.

Another idea might be if the shape allows to use two levers diametrically opposed to pry the press head out against the top of the cups (likely to damage the cups)

Good luck!
by hayers
27 May 2021, 7:56am
Forum: Does anyone know … ?
Topic: Barrier cream question
Replies: 28
Views: 2928

Re: Barrier cream question

I use Rozalex Dri Guard barrier cream for dirty/oily jobs where gloves not appropriate (eg when using rotating machinery in which a glove can get caught) and just generally when handling greasy/oily parts in the workshop where gloves would be annoying.

Once finished the worst of the muck rinses off, and cleaning much easier than without using normal household soap bars.
by hayers
22 Apr 2021, 9:14am
Forum: Bikes & Bits – Technical section
Topic: Re-aligning bent front forks
Replies: 3
Views: 356

Re: Re-aligning bent front forks

Assuming Malborough Wilts Argos Racing Cycles in Bristol is probably a good bet.
by hayers
9 Apr 2021, 1:27pm
Forum: Family Cycling
Topic: Teaching children to ride on the road
Replies: 3
Views: 5530

Re: Teaching children to ride on the road

ClappedOut wrote: 30 Mar 2021, 9:56pm
What I'm saying is teach them what will be expected and in advance.
Very good advice. If you have one, a talk through manoeuvres on one of those road playmats with a toy car/bike can explain things quite easily.

Another thing is check they know their left & right! I'd not realised that our eldest has a bit of a block on this so after some confusion I started using "bell side" and "gear side" as more reliable.
by hayers
9 Apr 2021, 1:11pm
Forum: Does anyone know … ?
Topic: Best Bike For Beginner?
Replies: 64
Views: 2857

Re: Help Of Choosing Correct Frame Size (Road Bike)

In simple terms, it's about trading two/three parameters:

1) saddle setback
This is how far the saddle is behind the bottom bracket (crank bearing).
Further back = less weight on hands, further forward = more racy. Too far forward for your type of riding will put excessive weight on hands leading to aches & pains.

2) height of, and distance to the handlebars
Typically closer to saddle and higher for leisure riding, lower and further away for a "racy fit".
You want the height and reach to be such that.you can use the drops comfortably - this then gives the most usable positions.

As.others have said what.dimensions achieve these vary depending on fitness, flexibility and core strength. Friends of mine are happy touring in a position I'd struggle to hold for a 10 min sprint whereas others might struggle to adopt even my position.

If you are unsure, find a bike that feels comfortable set up so you could move all the above either way - gives you options.

People often don't commute on 'best' bikes as they may have drivetrains that are more expensive and/or susceptible to wear, may have fast rolling, rather than robust, tyres, and perhaps no mudguards or rack - which most (but by no means all) will want for commuting.

The main thing is to get riding and enjoy it!
by hayers
24 Mar 2021, 8:02am
Forum: Bikes & Bits – Technical section
Topic: Best wishes for Brucey
Replies: 613
Views: 73463

Re: Best wishes for Brucey

Best wishes Brucey.

I'm not a frequent poster, but have gained much useful info from the back catalogue of posts.
by hayers
8 Mar 2021, 5:45pm
Forum: Bikes & Bits – Technical section
Topic: Child seat voiding frame warranty
Replies: 41
Views: 2012

Re: Child seat voiding frame warranty

Thorn quote max loadings for front & rear panniers, but not sure about more "mainstream" makes...
by hayers
24 Feb 2021, 7:08pm
Forum: Family Cycling
Topic: Cycling with a 9 month old & bike attachment for older child
Replies: 21
Views: 8981

Re: Cycling with a 9 month old & bike attachment for older child

Jdsk wrote:
martinn wrote:I have used a trail gator, a tag along, and a follow me. The follow me is massively superior to the tag along, which is superior to the trail gator, in terms of stability, in my experience, but we are all different.

Thanks.

I've often wondered how they compare, but never before heard from anyone who has tried them all.

Jonathan


We.used a follow me: worked well for me, and advantage of being seperable, but my wife always found it made her bike very unstable - I think because it's a ladies frame with reduced torsional stiffness.

Also had good experience with a "weehoo" and a "weehoo copilot" - would recommend both.