Search found 1399 matches

by djnotts
7 Mar 2017, 9:01am
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

Wouldn't a top swing front mech be better? The clamp ring mounts lower down (about 50mm lower) thus improving the clearance to the rear tyre. No, low mount is not possible - the seat tube - as often the case with carbon - bulges considerably as it envelops the bottom shell. No clamp would fit. I su...
by djnotts
6 Mar 2017, 11:02am
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

Thanks - that does look to have the least skewed clamp arm of anything I've viewed - wonder if it's been "manipulated"? I shall watch for other (cheaper!) examples of the model number. I also think that a button head hex bolt will give double the clearance that that the current standard pi...
by djnotts
3 Mar 2017, 3:04pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

"....put the cable clamp at the front rather than behind where it "should" be, seemed to work just as well, or use a bolt (like an Old School Campag front Mech Cable Anchor Bolt) rather than the Allen Key fitting to reduce the thickness of the head." I THINK that the way the nut ...
by djnotts
3 Mar 2017, 1:52pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

"... the reason it clashes is that the parallelogram is (as viewed from above) skewed about 30 degrees CW vs the chainring plane..." Precisely! And a common feature with many of those that I have looked at and which at first sight look suitable! I think I need to "stop worrying" ...
by djnotts
2 Mar 2017, 9:22am
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

PS I was influenced in choice of front mech by this https://janheine.wordpress.com/2013/03/25/trouble-with-sti-triples/ I should maybe have tried for a CX 70 (altho' from the photos I'm not convinced that the clearance issue would have been different). I certainly agree that a double rather than tri...
by djnotts
2 Mar 2017, 8:00am
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

I pretty much understood from the start all these issues - but the "design" of such a mongrel was always going to involve compromises. And with these I am prepared to live! If someone points me to a different way to achieve my 3 essential objectives then I will happily start another build ...
by djnotts
1 Mar 2017, 8:36pm
Forum: Bikes & Bits – Technical section
Topic: Keeping cable ends tidy and prevent fraying
Replies: 60
Views: 3143

Re: Keeping cable ends tidy and prevent fraying

I always leave enough wire for a nice finger size loop - so much easier to pull tight with cold wet fingers. And simple crimps. Or heat the end with a lighter and then use a small bit of gaffer tape! There are more than enough problems that exist for the sole purpose of finding a solution!
by djnotts
1 Mar 2017, 8:12pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

As far as I can judge, there is very little if any difference in clearance between the late '90s mtb mechs (and 34.9 clamps are not easily found) and the Exage CX which is from much the same era. With some demands on my patience the indexing front and rear is good. I can engage all f & r combina...
by djnotts
28 Feb 2017, 9:41pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

I agree that would be worth a try and did indeed search for a suitable "retro" model, 9 or 8. Price put me off but I shall probably try one (altho' as far as I can tell from the many photos I've skimmed they give no better clearance than the one I've fitted).

Thanks for the thoughts.
by djnotts
28 Feb 2017, 9:23pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

Yes I have noticed that! "....XT bottom pull, bottom swing mech (a M750 version? -nb there are several with very similar model numbers) which will work on your frame, as part of a 'trekking' groupset; this is meant to work with your chainset and is designed with your chainstay angle in mind too...
by djnotts
28 Feb 2017, 8:53pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

Wrong second snap!

Image
by djnotts
28 Feb 2017, 8:51pm
Forum: Bikes & Bits – Technical section
Topic: Race Frame/MTB Mongrel
Replies: 23
Views: 1037

Re: Race Frame/MTB Mongrel

Thanks all! Not been able to identify an mtb front mech that will fit - new 9 speed ones for example are mostly dual pull and simply will not squeeze into space twixt down tube and tyre! Low mount ones will of course not fit low enough because of bulging carbon as blends into bottom shell. Road mech...
by djnotts
25 Feb 2017, 4:40pm
Forum: Bikes & Bits – Technical section
Topic: SICK OF IT - GEARS AND THINGS
Replies: 82
Views: 3573

Re: SICK OF IT - GEARS AND THINGS

"....1 x 8 or 9, even 1 x 7, have never been common gearing choices...." Well, yes, I guess I meant "innovative" in relation to off the shelf - I did actually have a few 1 x 9 set ups for winter use a few years ago as I moved away from single speed simply for ease of keeping the ...
by djnotts
24 Feb 2017, 8:14pm
Forum: Bikes & Bits – Technical section
Topic: SICK OF IT - GEARS AND THINGS
Replies: 82
Views: 3573

Re: SICK OF IT - GEARS AND THINGS

While I dislike the economic philosophy that lies behind the marketing that lies behind the 2 x 10 and 1 x 11 innovations, I no longer really care about the rings and cogs numbers, all I really need is anything that will get me a low of 20" or less with a high of 80 to 90". Until my lungs ...
by djnotts
20 Feb 2017, 2:37pm
Forum: Does anyone know … ?
Topic: Advice on a Pinnacle Lithium 3 2017 Hybrid Bike
Replies: 20
Views: 11045

Re: Advice on a Pinnacle Lithium 3 2017 Hybrid Bike

Looks a useful and versatile bicycle to me and for not a lot of money! Tarmac or (gentle) off road no problem.