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by Tigerbiten
22 Oct 2019, 2:03am
Forum: Does anyone know … ?
Topic: Bikes and air pockets (General not technical)
Replies: 13
Views: 752

Re: Bikes and air pockets (General not technical)

Bikes that are used for high speed behind vehicles tend to be single speed. They get towed up to a speed such that they are just in the riders power envelope. Then slowly accelerate the rest of the way under the riders own power. That why the HPVs have a +4 mile run up to hit +80 mph at battle mount...
by Tigerbiten
20 Oct 2019, 11:41pm
Forum: Touring & Expedition
Topic: Camping touring vs B&B touring - how much extra weight?
Replies: 35
Views: 938

Re: Camping touring vs B&B touring - how much extra weight?

An extra 10 Kg in weight will slow you down by roughly 1 mph on gently rolling terrain. So I recon a full camping load will slow you down by around 2 mph on average, 1 mph if very flat and 4 mph if very hilly. Using that you should be able to roughly work out how long you'll be on the bike each day....
by Tigerbiten
20 Oct 2019, 9:34pm
Forum: Touring & Expedition
Topic: Camping touring vs B&B touring - how much extra weight?
Replies: 35
Views: 938

Re: Camping touring vs B&B touring - how much extra weight?

How low do our gears go on your bike ?? The lower your gears are, the easier it is to lug the extra few Kgs of camping gear up the last hill before the campsite. A lot of touring bikes have a first gear around the 25" range for this reason. How much do you want to spend on camping gear ?? And h...
by Tigerbiten
17 Oct 2019, 4:49pm
Forum: Bikes & Bits – Technical section
Topic: Small wheel blowouts - options?
Replies: 96
Views: 2128

Re: Small wheel blowouts - options?

The point about technique is that a *wrong* way also exists - and that is dragging the brakes all the way down. This is the "intuitively" safest way - if one does not know the full physics of the situation :) (or of course if your wheels/brakes are heat-proof. Or it's just damn cold.) And...
by Tigerbiten
15 Oct 2019, 12:00pm
Forum: Bikes & Bits – Technical section
Topic: Night lights, side of bars?
Replies: 14
Views: 513

Re: Night lights, side of bars?

In theory it's illegal to have a light on the left of the centerline on a bike without a balancing one on the right.
But I don't think you'll be pulled up for it.

YMMV ........... :D
by Tigerbiten
14 Oct 2019, 9:08am
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 501

Re: Is the gap between middle and outer the same as between inner and middle?

On my bent trike, the 55/38 double chainrings on my HSD are very sensitive to chainring spacer size. My main troube is the chainline of the outer ring is fixed due to how the spider is fixed to the drive. So with 2mm spacers, the chain just rubs on the outer ring. And with 4mm spacers, the chain can...
by Tigerbiten
13 Oct 2019, 12:22pm
Forum: Bikes & Bits – Technical section
Topic: Is the gap between middle and outer the same as between inner and middle?
Replies: 11
Views: 501

Re: Is the gap between middle and outer the same as between inner and middle?

Manc33 wrote:I shall just experiment with 1.5mm thick and 1mm thick washers.


You can pick up thin (0.45mm, 1.2mm) chainring bolt spacers at Spa Cycles for £1.
Thicker spacers (2mm upwards) are £2.
But postage is around £4 if you don't spend enough for free postage.

Luck ....... :D
by Tigerbiten
9 Oct 2019, 12:07pm
Forum: Bikes & Bits – Technical section
Topic: Gear changing strategy; how do you use a triple?
Replies: 61
Views: 1650

Re: Gear changing strategy; how do you use a triple?

It’s interesting how the use of chainwheels has altered over time. Going back several decades rear cogs had few ratios on them and what was there was relatively widely spaced. IIRC it was common for a triple to have two large rings that acted as a splitter gear, my old copy of Richards Bicycle Book...
by Tigerbiten
9 Oct 2019, 12:23am
Forum: Bikes & Bits – Technical section
Topic: Gear changing strategy; how do you use a triple?
Replies: 61
Views: 1650

Re: Gear changing strategy; how do you use a triple?

I had planned to ask, sometime in the future, about lowering the bottom gearing without taking much off the top end. 46/34/24 looks interesting. 12 tooth gap then 10. Would 48/36/24 be possible? 12 teeth gap between each? This would give me the top gearing but bring the bottom gearing down.... Put ...
by Tigerbiten
8 Oct 2019, 5:26pm
Forum: Bikes & Bits – Technical section
Topic: Gear changing strategy; how do you use a triple?
Replies: 61
Views: 1650

Re: Gear changing strategy; how do you use a triple?

I was aiming for a range greater than any derailleur setup when I was picking the gears for my bent trike. So I ended with a Schlumpf HSD on the front and a Rohloff on the back. Now a Rohloff is a 7 speed with a 2.45x step down to give you the full 14 gears and the Schlumpf HSD is a 2.5x step up whi...
by Tigerbiten
5 Oct 2019, 2:45pm
Forum: Non-standard, Human Powered Vehicles
Topic: Tyres for trike
Replies: 16
Views: 542

Re: Tyres for trike

People put too much emphasis on "SPEED". It's not a race, enjoy the ride and it the M+'s take 5min's longer for the journey. :mrgreen: LEAVE 5 MINUTES EARLIER! :roll: And think about how long it takes to fix a flat/change a tube at the side of the road, if you're worried about the M+'s be...
by Tigerbiten
2 Oct 2019, 9:07pm
Forum: Lands End to John O'Groats
Topic: Tenting/Camping LEJOG
Replies: 24
Views: 929

Re: Tenting/Camping LEJOG

I also cycle-camp. I tend to rough out a possible route on a route planner. Then I use the likes of "https://www.ukcampsite.co.uk/" to find any/every possible campsite along it. Once found then I'll firm up the route. But there's very few places in the UK where you cannot find the next cam...
by Tigerbiten
2 Oct 2019, 12:25am
Forum: The Tea Shop
Topic: Working hours, start 06:30
Replies: 46
Views: 1630

Re: Working hours, start 06:30

Getting up that early is easy, I did it for years without any problems.
What's harder is accepting the lifestyle shift needed so that you get enough sleep.
It can be hard going trying to get to sleep around 8-9 pm every night if the area you live is noisy.

YMMV ........ :D
by Tigerbiten
1 Oct 2019, 6:00pm
Forum: Non-standard, Human Powered Vehicles
Topic: Bike route gate size
Replies: 15
Views: 489

Re: Bike route gate size

Do you have any Pictures of "A" & "K" frame type barriers. Look in "kbarriers.co.uk" for pictures. They work reasonably fine for everything but bikes as they can be sized for wheelchairs, buggies, recuments, etc. But they're just to narrow for bicycle handlebars to...
by Tigerbiten
1 Oct 2019, 4:32am
Forum: Bikes & Bits – Technical section
Topic: Anyone using an 11-speed 11-42t (or similar) with a triple chainset?
Replies: 64
Views: 2478

Re: Anyone using an 11-speed 11-42t (or similar) with a triple chainset?

I have thought many times about getting a Rohloff hub, but I am not sure about the high gears if I have my lowest set at something like 17". On my current triple with a MTB cassette it's got a range of 793% :P That's fairly easy to do. Just run a 15t sprocket on a Rohloff with a 50/34 compact ...