Forum menu
Sometime Brant, just sometimes, you speak some sense.
Have some more beer.
Have some more beer.
I have run out of beer and just opened a bottle of 2007 French Cab Serv which costs 1170RMB (about £12).
It's a half bottle
It was cheaper per unit alcohol than the gin and tonic.
Yup, Brant +1. Cotic arent Tesco Value Mince... Have another beer on me 😉
I thought cotic's USP is that it's a Cotic...
We just missed the Cotic crew on Snake pass the other week, I briefly chatted to the rear rider in the group as out paths crossed.
Brant are you hinting that the same factory as BMC may make elements of future PlanetX products? 😉
Brant are you hinting that the same factory as BMC may make elements of future PlanetX products?
maybe
but definitely the same factory that makes BMC makes current Titus carbon products.
How do you 'know' it?? Surely if you work for Cotic (I don't know if you do or don't? but your comments read that way??) then your opinion is biased.
Hora, I should be clearer to all, to be fair. I work as a product manager (was Madison / Genesis, now Evans) and I'm in Taiwan now, while here I see things in factories. There's no secrets out here, you shouldn't have anything to hide and you stumble across things all the time. I don't think it's my place to say who makes what where, but Cotics are made somewhere that I trust and have experience with.
Out of curiosity what else is made in this factory that you trust? Just looking for good bike frames not trying to work out which factory it is.
But the real question is what is made in a factory you don't trust? (not that your going to answer it or expect you to)
Rustybike, you're asking an awkward question ) I said it's not for me to say who does what where or if I didn't have a good impression of a factory where someone else makes stuff. (edit, nothing against anyone that does discuss all this, as I said there's no secrets here anyway). The brands you'd be interested in tend to be good for good reasons, where they're made being part of that, design and communication, QC etc another (related) part of it.
Bicycle Retailer and Industry News report on who of the bigger brands makes what where each year, most brands name their sources, but without knowledge of the factories it will mean little.
What you may be suprised by is that often, brands with very high perceived quality / coolness are made in the same places as brands that some rate less. That's marketing for ya.
Brill. Where can I pick up a unbranded carbon road frame/fork then? 😉
(Early morning joke)
The main USP, I believe, for the steel front triangle is stiffness around the pivot. Cy points out that you can only go so big with a seat tube and a steel tube that size is stiffer than an aluminium one. I gather the Hemlock was notable for having great suspension action but too much unwanted flex around the pivots, and Cy's reasoning behind the Rocket design appears to be producing a slacker frame with much greater stiffness and similar feeling suspension with a bit more feedback (once you take into account improved shock designs).
Hora, I should be clearer to all, to be fair.
Nae, don't worry it's just hora. No one really pay any attention about his posts.
FrenchJuan? You've ditched the free-translation/Jack Daniels method of posting then? 🙄
Funny thread this. If Niner for instance had made this bike in 853, it would have been well the other side of £2k and no better finished. Obviously it would also have had bigger wheels, but I use them as an example of a brand with similar edge of niche/mainstream brand who make steel frames in similar places.
"Weren't the old Cotic full suss frames knocked out at a reduced price at the end?"
IIRC they went up at the end, to £1100 (inc RP23, seat collar, chainstay, posted)
"Why not introduce a single pivot/simple frame at a lower price point as the start of a full suss range builder?"
Like a heckler? I assume many more people with know/hear of santa cruz than cotic, why would you buy a cheap cotic (after WMB/MBUK/bikeradar told people the hemlock broke (without saying there was a spacer missing)) over (the well proven) Santa Cruz Heckler?
How does a missing spacer cause a frame to break??
It was cheaper per unit alcohol than the gin and tonic.
You know you're on a mission to get drunk when you start doing those sums... 😀
Plenty of single pivots on the market. Different angles, shape, colours, sizing differences.
Same with 4-bars. Should all the other manufacturers give up if one offers a 4-bar?
After making my earlier comments, I've been trawling around looking at prices.
I hadn't realised just how much some Taiwanese frames were going for these days. For e.g. I didn't realise that the RP23 wasn't included in a lot of the baseline prices.
Cotic Rocket RP23: £1475
TRANSITION Bandit RP23: £1400
TRANSITION Covert RP23: £1400
Santa Cruz Heckler RP23: £1299
Santa Cruz Butcher RP23: £1599
Pivot Mach5.7 RP23: £1699
Some other prices:
Orange 5 RP23: £1499.99
Nicolai Helius AM RP23: £2045
Intense Tracer 2 RP23: £1799
I am still loving my hemlock.
Will be looking out for these new frames..
but definitely the same factory that makes BMC makes current Titus carbon products.
just to clarify BMC have their own production facility in swissland where they make their own carbon frames.
[url= http://www.bmc-racing.com/int-en/impec/factory-tour.html ]http://www.bmc-racing.com/int-en/impec/factory-tour.html[/url]
Santa Cruz Heckler RP23: £1299
Its not worth that much. (Thats coming from a SC fanboi).
it's a tricky game though - using steel.
we don't care what brand/type of aluminium Transition use. But if you want steel, anything other than 853 would be seen as cheap, and 'not quite good enough', or 'made from gas pipes'.
our aversion to anything that doesn't have a little green/yellow/black sticker is maybe a little irrational, and it adds cost.
853 is amazing stuff though, it's use can be justified (add some cost, save a little weight)
a Rocket made from on-one's DN6 tubing would be bit cheaper/heavier, but would lose a little of it's 'i want' appeal.
On those prices surely the bargain of the moment is the Ariel frameset with RP23 from Saracen at £999....?
Universally acclaimed by all in the industry who rode/tested it but not fashionable at the moment so largely unnoticed....shame, British firm and all that.
A Titus El Guapo is half the price, go figure...
chiefgrooveguru - MemberI gather the Hemlock was notable for having great suspension action but too much unwanted flex around the pivots
TBH I'd never really heard that til Cy mentioned it in the Rocket posts. Not something that I've ever noticed myself tbh, the Hemlock's way stiffer than many competitors.
What were those downhill bikes with the pull shocks and space frames, Anceloti or something, did they have steel frames, or just tubular aluminium?
I've been lucky enough to ride one of the first protypes.
Wasn't convinced about a steel FS bike: can't work else everyone would be doing it surely?
But was very surprised: looks right in the flesh (realistically probably the most important to a frame's success at the end of the day!), light weight, very stiff (noticeably stiffer laterally than my 2010 Remedy), and rode very well. The one I rode had a rp23 on it and more 'pop' than any other bike I've ridden. Very responsive, loads of airtime off any little bumps/roots - a lot of FUN!
And yes, this might be a bit biased as I am a mate of Cy's, but I'm not a Cotic fanboy, and have owned a fair few of recent sorted full sus bikes.
And is it worth the price? Only you can answer that.
isn't there a Canadian company who make aluminium front ends and steel back ends?
thepodge - Member
isn't there a Canadian company who make aluminium front ends and steel back ends?
Xprezo - think they're all steel.
the doe-eyed market will love it.
the smart money is on a generic well proven taiwanese aluminium frame with a 5 year+ warranty and a proven history.
there are numerous options out there in the £899-£1100 price bracket.
Am I strange in thinking that the price is a little bit irrelevant? It's in the ball park of all the other bikes, +/- a couple of hundred quid.
At the end of the day, if it's "The Right Thing (tm)" for you for whatever reason and you *WANT* it, then price is pretty much irrelevant. You'll work out a way to get hold of one. In similar situations, if I can't afford what I think is "The Right Thing (tm)", then I'll carry on saving until I can. The discomfort of the initial cost is soon forgotten when "The Right Thing (tm)" turns out to be the right thing and you love using it.
It's worth remembering that despite the amount of interweb coverage Cotic get they're still a tiny company. I guess they might shift, what 100?, Rocket frames, max, over the next year, worldwide. There will be enough people who *want* the Rocket, either because they love the fit ride and handling, or the looks, or that it has an 853 sticker or simply because it says Cotic on it, that they'll sell. They won't appeal to everybody, but then that's the purpose of a niche!
I've seen one in the flesh. Looks pretty good, but until I (and everyone else on this thread) has ridden one (the important bit), it's all speculation. It's unlikely that it'll be a complete dog. The Hemlock, despite it's press slagging is a great riding bike (the missus has one), and I still wonder if I should have bought one too, as it would be a much better all round bike than my Uzzi is, although obviously less DH biased.
5+ year warranty, who doing them?
giant (5 years). and marin if you want to pay for a longer period, there may/will be others.
i wouldn't buy any frame with just a 1-2 year warranty unless it's seriously cheap.
but then a lot of people seem to change bikes fairly frequently as the next big thing is released.
I didn't know they were on 5 years and I have a giant myself
So Mr SMith, will BMC pass some production to China, or Brant may these BMC's merely be copies?
5 years on Giant - didn't work for me when the bearings popped after a year and knackered the rear triangle of my Trance...
Only £70 for a new rear end though!
Folks try to stop verging on sycophantic leanings. As I said the Heckler RP23 is not worth the price.
Specialized is but that isn't niche enough is it? Let's wait for independent testing- then I may buy 😉
So Mr SMith, will BMC pass some production to China, or Brant may these BMC's merely be copies?
no idea. but the factory in switzerland is not a dream. maybe they are like pinarello with the lower end frames built in the far east and assembled in italy.
I'd like to have a go on one. I think they should make a 4.5" travel version.
Photos due mid Feb with frames available some time in march apparently.
Whole screed on why steel out on a new email, guess updated on website sometime soon...
Also unlikely lower travel 'version' to be in steel...
At that price will it be a steel?
(I'll get my coat)
Here you go...
"One of the most notable features of the Rocket is it's choice of material. Up to a point I've been expecting rolling of eyes and 'what of have those silly steel sniffers at Cotic gone and done now?' and 'why on earth would you use steel on an FS bike? It'll be flexy and heavy, surely?' type questions. I'll be honest with you, before I started this project I'd have been right there with you if someone else had built a steel FS bike. Although we love steel for our rigid frames, the Hemlock was aluminium because, well, that's what you make full suspension frames out of, right? I'd not challenged assumptions at all with that bike, I'd just done what everyone else did. And that was the plan when the Rocket project kicked off. I was focusing on geometry and suspension feel and all the other improvements that I've talked about in the other essays I've written recently. But a couple of things made me challenge those assumptions.
Firstly, I'd come back from the trade shows in late 2009 quite disillusioned with the road bike market of all things. At Eurobike there was all the usual carbon loveliness and aluminium swoopiness, even a bit of ti, but anything steel and skinny tyred seemed to be trying incredibly hard to look like it'd been built in a shed in Italy in 1953. It made me sad, because I do love steel as a material for rigid frames. Despite the fact that any frame made from steel would be heavier than the above materials I felt that no one building something modern and forward looking in steel on the road was doing the material and it's fans a disservice. You could build a road bike with lovely feel and durability at a great price and I thought there was a gap in the market, so I designed a road frame to fulfil this brief. Although we've not moved that project much further forward I'm really pleased to see that Condor have taken the batten and run with it with their Super Acciao. What this highlighted when we were talking about the road project was what we appreciated about steel; it's durability, it's strength, it's feel and the look. I guess you could say there was an element of dogma involved, but it wasn't that there were no advantages to using steel, it's just that weight wasn't one of them and we liked the other upsides.
Secondly, as i was kicking around the specification of the new bike with some of the guys I ride with and one of them asked why I didn't just start with a BFe front end and graft the suspension onto that. His point being that with it's 35mm seat tube and other large diameter tubes, it's incredibly tough and strong and not exactly a shrinking violet when it comes to stiffness. With my firmly held assumptions I dismissed this out of hand, but when I mentioned it to Paul (Cotic's organiser extraordinaire) he reminded me of our conversations about road bikes and asked why I hadn't looked at it harder, so now my bluff had been called!
It was time to do some numbers and justify myself properly. Remember, one of the key things I wanted to improve on from the Hemlock was the stiffness of the connection between the front and rear ends, so I started with the seat tube as it's where all the suspension pivots would be hanging from. This would be critical. I made a comparison between the 35mm aluminium seat tube we used on the Hemlock and the 35mm seat tube from the BFe. Let's do a science bit now so you know where I'm coming from with this.....
Tubing stiffness comes from two elements; the material stiffness (the Young's Modulus, or E) and the mechanical stiffness (Second moment of area, or I). Combine the two (EI) and you get compare the overall stiffness of the part you're analysing when they aren't in the same material. Usually rigid steel frames exhibit less stiffness than aluminium ones because steel is so strong that you can use it in small diameter, very thin wall tubes so despite steel being 3 times stiffer than aluminium as a material (E is around 77 for aluminium, around 210 for steel), the mechanical stiffness I is low because of the small diameter and thin wall. Because I is quartically related to diameter (d^4 is an element of the I calculation), increasing diameter from 35mm (usual steel down tube) to 50mm (usual aluminium down tube) makes the mechanical stiffness 4 times larger. And that's before you consider that aluminium needs thicker walls than the steel tube. So the lack of material stiffness in aluminium is overcome by using mechanical stiffness. The reason you can't build aluminium tubes as small and thin as steel ones is because aluminium is also very much weaker than steel (typically 300-400MPa Ultimate Tensile Stength vs 1300MPa for 853), so in simple terms the mechanical stiffness in aluminium tubes is a function of needing to use lots to stop is breaking.
So, that's the simple version of the basis of my comparisons across different materials. The key difference in this case is that the mechanical stiffness is similar. The seat tubes being compared are the same outside diameter - although the steel is much thinner wall - and aluminium can't play it's 'big' hand here as you can't go larger on the seat tube without running into all sorts of compatibility problems with front mechs, tyres, seatposts and seatclamps. So where the mechanical stiffness is similar, you mutliply it by the material stiffness (steel is 3 times stiffer than aluminium remember) and what do you know? The steel seat tube is massively stiffer than the aluminium one. Not a little bit, but massively stiffer. Sure it's a little heavier too, but my main concern for this part of the frame is tying the suspension pivots to the seat tube as hard as possibly to give a solid ride feel. So, all of a sudden steel is in the game!
From here, the next stage is a full weight analysis of a steel version of the frame. The seat tube was a little heavier than the alumium one, so I needed to be sure that lot's of 'little bit' heavier's didn't add to a whole lot heavier on the whole frame. The comparison was with the final 2011 spec Hemlock. Again, steel has the power to surprise. When you're looking at making a hard riding bike that needs a lot of durability and strength steel comes into it's own as it's so strong and durable. Aluminium, conversely, needs to be used copiously in a frame of this type to make up for inherent low strength. That great big 50mm down tube on the Hemlock weighs about the same as the 38mm steel down tube on the Rocket, but the Rocket down tube is stronger. Same with the top tube. In fact the only place on the frame where it didn't make sense to use steel was the swingarm, as the large machined pieces required for the bearing housings and dropout sections would not only have been unnessarily heavy, the machining of steel is very expensive compared to aluminium so it would have been much more to make. So the swingarm is aluminium in nice big sections to tie the pivots and axle together properly. Play to the strengths of the material in the location they need to be used.
What we ended up with is the Rocket frame, which is weight competitive with the similar aluminium bikes out there, but has a level of durability and stiffness which is really high. I also have to come clean at this point and also admit that I love how it looks too. There, I said it.
The key thing here is that steel was right for this application, right for the Rocket, where high loads are going into the frame from the long forks and the type of riding a 150mm travel trail bike encourages. This meant that the high strength of steel made the weight of the frame competitive with other materials with a level of strength and durabilty we were really happy with. In other applications - shorter travel frames for instance, say 100mm both ends - where loads are lower and the riding conditions aren't expected to be as arduous, these don't suit steel so well because you can't go much lighter than the Rocket in steel whilst maintaining the durability. You end up with a short travel frame which would be very heavy for it's class and massively over strength. So whilst the Rocket is a great use of the material, we won't be dogmatically using steel for all the other suspension projects we're working on. Just as with the Rocket, I'll sit down and do the numbers and make an informed choice, only this time I won't need pushing into it by other people 😉
I hope you've enjoyed these essays on the project. It's been great to go into so much detail and really explain the processes and where all the ideas came from. We'll have the first production frames shipped airfreight in mid-February for promotion purposes for a product launch, and at that point we'll release photos because they will be the exact frames you'll be able to buy in mid-March when the main bulk of the production arrives.
Cheers,
Cy
www.cotic.co.uk
07970 853531
www.facebook.com/CoticLtd
www.twitter.com/CoticLtd
www.cotic.co.uk/news"
but anything steel and skinny tyred seemed to be trying incredibly hard to look like it'd been built in a shed in Italy in 1953
didn't look very hard then did you. 'modern' steel frames made with oversize tigged steel (spirit, deda, 853, true temper) are available if you look hard enough, some are made in a shed in italy but noodly stovepipe they are not.
38mm steel down tube on the Rocket, but the Rocket down tube is stronger.
38mm? pfft 1mm smaller than the columbus spirit down tube on a pegoretti.
and that's 'only' a road bike 🙄
OK, in case it wasn't obvious enough that's Cy's message about the Rocket, no point replying on here to him unless he happens to be reading.
Your comparison with the Pegoretti strikes me as meaningless tbh, OD by itself tells you nowt without knowing thicknesses too, and road bikes have such different requirements for strength and impact resistance- you wouldn't want to build a large, thin downtube on an mtb but you might do on a roadie since it's less likely to get hit with a rock the size of a brick. The comparison with the old Hemlock downtube is sensible tbh.