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by 531colin
23 Aug 2017, 10:58am
Forum: Bikes & Bits – Technical section
Topic: SPA CYCLES STEEL TOURING FRAMES
Replies: 152
Views: 6693

Re: SPA CYCLES STEEL TOURING FRAMES

........... How does the material/construction and resultant stiffness of the disc fork compare to the non disc one? Comparing the steel forks for rim brakes and disc brakes..... (note...the rim brake forks all have low-rider fittings - if you don't want low riders, its readily possible to construc...
by 531colin
22 Aug 2017, 8:21am
Forum: Bikes & Bits – Technical section
Topic: Long shot....source of odd bearings?
Replies: 5
Views: 361

Re: Long shot....source of odd bearings?

thanks everybody, I'll have a look!
by 531colin
17 Aug 2017, 9:41am
Forum: Bikes & Bits – Technical section
Topic: Tyre help please
Replies: 21
Views: 960

Re: Tyre help please

I think that all these things add up, and the human factor complicates matters. For example adults who ride a Brompton (or similar) for the first time almost invariably wobble like fury. The trail usually isn't wildly different from larger wheeled bikes that don't cause such wobbling, so maybe the ...
by 531colin
17 Aug 2017, 9:35am
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

As a specie, we are always looking for "one number" to compare 2 different things. If we are looking to compare the steering of 2 different bikes then that "one number" is trail.** My initial assumption that I could compare the 2 bikes based on head angle is only sound if the oth...
by 531colin
17 Aug 2017, 8:15am
Forum: Touring & Expedition
Topic: marathon supreme vs marathon greengaurd off road grip
Replies: 12
Views: 509

Re: marathon supreme vs marathon greengaurd off road grip

Perhaps unsurprisingly my experience is the opposite of some posters. The old Kevlar Marathon is my default choice for mixed road and roughstuff. Marathon Racer is lighter and nicer to ride, and its fine in the dry as long as you take care of the sidewalls, but will just let go without warning on mu...
by 531colin
17 Aug 2017, 7:47am
Forum: Health and fitness
Topic: Advice on getting back to fitness...
Replies: 13
Views: 401

Re: Advice on getting back to fitness...

I never stopped commuting to work by bike, even when the kids were small. If you can stick at that, i think its really all you need.
There is an inspirational account of one person's journey here...https://forum.cyclinguk.org/viewtopic.php?f=49&t=116580
by 531colin
17 Aug 2017, 7:31am
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

We were, at one stage, trying to compare the steering geometry of 2 bikes. I think the Trek is fairly well documented, i accepted that my misgivings about their trail figure were unfounded. Giant, in the link above, don't give either trail or fork offset. If we assume the offset is 45mm, using Bruce...
by 531colin
16 Aug 2017, 9:51pm
Forum: Bikes & Bits – Technical section
Topic: Long shot....source of odd bearings?
Replies: 5
Views: 361

Long shot....source of odd bearings?

OK, so they are out of a pushchair/stroller thing, not a bike, but it would be good to be able to replace these "bearings". They are a manufactured unit which drops into the wheel hub, to be frank they are pretty crude, like the bearings in "tin lizzie" skates, not proper deep gr...
by 531colin
16 Aug 2017, 9:33pm
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

Interesting fork offsets given, 48 and 53mm, both longer offset than the "standard" 45mm, yet the trail looks long to me, for those angles. Anybody competent to punch it into a bike CAD? (eg https://www.bikecad.ca/ seems to tally OK with the trail table in http://johnforester.com/Articles...
by 531colin
16 Aug 2017, 8:55pm
Forum: Does anyone know … ?
Topic: Weight all on palms
Replies: 4
Views: 447

Re: Weight all on palms

Too much weight on your hands is invariably caused by the saddle being too far forward. Slide the saddle as far back as it will go in the fitment on the top of the seatpost.....if there is still too much weight on your hands, try a layback seatpost https://forum.cyclinguk.org/viewtopic.php?f=1&t...
by 531colin
16 Aug 2017, 8:39pm
Forum: Bikes & Bits – Technical section
Topic: SPA CYCLES STEEL TOURING FRAMES
Replies: 152
Views: 6693

Re: SPA CYCLES STEEL TOURING FRAMES

Back to topic, does anyone here have an idea when we might see the Steel Tourer Disc frame from Spa in retail? Hopefully we are on the final prototype, which means it might be mid next year. How much of a load and how big a tyre are you looking for? This one.... https://c1.staticflickr.com/5/4388/3...
by 531colin
15 Aug 2017, 9:44pm
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Bicycle_dimensions.svg/350px-Bicycle_dimensions.svg.png Image from my Wiki. link above. Take a line through the headset centre. The perpendicular distance from the wheel axle centre to this line is the offset (or rake).....irrespective of th...
by 531colin
15 Aug 2017, 9:09pm
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

Interesting fork offsets given, 48 and 53mm, both longer offset than the "standard" 45mm, yet the trail looks long to me, for those angles.
Anybody competent to punch it into a bike CAD? (eg https://www.bikecad.ca/
by 531colin
15 Aug 2017, 8:42pm
Forum: Does anyone know … ?
Topic: Giant Defy 3 (2010) vs Trek Domane AL2
Replies: 18
Views: 533

Re: Giant Defy 3 (2010) vs Trek Domane AL2

The Domane has a head angle of between 71 and 72.1 depending on size. https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road/domane/domane-al/domane-al-2/p/1400000-2018/.... Nope, my PC locks straight up as soon as Trek's website appears.....could you copy and paste the Geo. table ont...
by 531colin
15 Aug 2017, 8:05pm
Forum: Bikes & Bits – Technical section
Topic: SPA CYCLES STEEL TOURING FRAMES
Replies: 152
Views: 6693

Re: SPA CYCLES STEEL TOURING FRAMES

Yeah, but, R2, I seem to remember you replace cables every year or two as routine maintenance? If you do that, you shouldn't be breaking cables at all, unless maybe you're riding round the world and you haven't told us? I imagine i would change gear more often on STIs than bar ends.....bar ends are ...

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