Thorn Raven Tour - SJS Cycles

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FORK OPTIONS The New Raven has a choice of steel forks. 10 The NEW RAVEN We have our ST1 fork, which uses Reynolds Cr-Mo blades and steerer in Super Tourist gauge. This fork has V brake bosses, Lo- Loader bosses and mudguard bosses. It also has bosses, under the cast fork crown, to screw the mudguards directly to the crown, which itself has an M6 boss to mount a dynamo headlamp. These forks are strong enough to accept 6Kg on each side of the fork. We also have our C2 fork, this uses Reynolds 853 blades and steerer in Competition gauge, both these items are unique to Thorn. C2 forks are exceptionally comfortable, due to the light gauge, fantastic highest quality steel and elegant tight radius bend but they are not designed to and must never be modified to, carry any luggage. The absence of Lo-Loader fittings gives them a very clean line. They do have stainless fittings for the direct mounting of mudguards and an M6 boss for a dynamo headlamp. The C2 fork is much more expensive to produce and consequently it costs £130 extra. C2 FORK NEW THORN RAVEN Issue 13 – AUTUMN 2012 [1] The NEW RAVEN frames are built using one of three different diameter tube sets. The small frames are built with, what were once known as “standard diameter” tubes. The medium frames are built with oversized diameter tubes and the large frames are built with extra oversized tubes. (For more information please see box below and page 11) [2] Both of the fork options use a wide cast fork crown, like the RST frames, for those who are familiar with them, these forks and the NEW RAVEN frames have clearances for tyres up to 2.15” [3] The NEW RAVEN frames can carry heavy loads without drama, or speed wobbles, please see the matrix for precise details. PLEASE NOTE: If you are looking for a very serious Expedition Touring bike, you ought to look at our NOMAD Mk2. [4] The NEW RAVEN can be built into a pretty quick and nimble bike for general use, especially commuting. It is particularly good on rough and broken roads. PLEASE NOTE: If you are looking for a very sporty Rohloff bike, you should perhaps consider the THORN MERCURY. ST1 FORK The NEW RAVEN frames are built from Thorn 969 seamless, cold drawn, heat treated butted Cro-mo in 0.9/0.6/0.9mm gauge. The small frames have a 25.4mm top tube, and a 28.6mm down tube. The medium sized frames have a 28.6mm top tube and a 31.8mm down tube. The large frames have a 31.8mm top tube and a 34.9mm down tube. All frame sizes use 28.6mm seat tubes and 16mm heavy gauge seat stays. The NEW RAVEN has a choice of Super Tourist or competition gauge 853 forks. 10
11 The NEW RAVEN Issue 13 – AUTUMN 2012 Size Matrix for NEW THORN RAVEN Probable height of cyclist suitable for this size frame. Frame size FORK offset Reqd. Frame tube diameters Max Load Using Front and Rear Panniers, 3Kg bar bag + 3 cages. Max Load Using Rear Panniers, 2Kg bar bag + 3 cages. NEW THORN RAVEN Slope Seat Tube C to C Virtual top tube Seat Angle Chain Stay Mid-Tube S/O (Stand Over height) 1490-1570mm 475M 52 Standard 33Kg 17Kg 60 415 550 74 432 715 750 1525-1660mm 500S 52 Standard 33Kg 17Kg 55 445 540 73.5 432 740 770 1525-1660mm 500L 52 Oversize 36Kg 21Kg 55 445 575 73 438 740 770 1600-1770mm 530S 52 Oversize 36Kg 21Kg 50 480 550 73.5 438 780 805 1600-1770mm 530L 46 Oversize 35Kg 20Kg 50 480 590 73 445 780 805 1700-1820mm 565S 52 Oversize 36Kg 21Kg 45 520 560 73 438 815 835 Height of top tube @ junction with head tube 1700-1820mm 565L 46 EXTRA Oversize 40Kg 24Kg 45 520 605 72.5 445 815 835 1780-1920mm 600S 46 EXTRA Oversize 40Kg 24Kg 40 560 575 72.5 445 850 870 1780-1920mm 600L 46 EXTRA Oversize 38Kg 23Kg 40 560 620 72 451 850 870 1565-1790mm 420S-T 52 Important notes on NEW RAVEN frames by Thorn’s designer Andy Blance. September 2012 My thinking behind the NEW RAVEN was this:- “The THORN NOMAD is regarded by most people, who have tried one, as being the finest expedition bike ever made. Those who have ridden the THORN MERCURY have enthused about its brisk sporty performance. As we have these two fine bicycles, we ought to do our utmost to make our new THORN ROHLOFF BIKE the ultimate all-rounder.” This is what I believe I’ve achieved! There are definite and distinct advantages to using 26” wheels and lately, I have become even more convinced that, with 26” wheels, opting for very high quality fat tyres is a better decision than choosing skinny or medium width tyres. High quality fat tyres roll easily and are exceptionally comfortable. The tyres and the rims are still relatively light in weight, which makes for nippy acceleration and easier climbing. Fat tyres protect the rims and allow “off piste” routes to be taken, with less risk. 26” wheels are stronger than 700c wheels of the same weight. Even at the same weight as a 700c combination, 26” wheels and tyres have lower inertia, thanks to their smaller diameter. Step Through 33Kg 17Kg N/A 450 555 73.5 438 N/A N/A I believe that most people would benefit from having 26” wheels on a general purpose bike, in most circumstances. You can focus the NEW RAVEN towards being a load carrying machine, or you can focus it towards being a supercomfortable, sporty, light-weight, thoroughbred beastie for rough roads, by selecting the appropriate fork please see page 10. I have taken this opportunity to rationalise the sizing. The NEW RAVEN (Rohloff specific) frames and the Mk3 Sherpa (derailleur specific) frames are now manufactured in exactly the same sizes, using the same diameter tubes in exactly the same 2 colours. As a consequence, spare forks for Mk3 Sherpa or the NEW RAVEN are now the same item. In addition to rationalising the sizes, I decided to use different diameter tubes for different sized frames. The smallest frames now use standard size tubing, which is 1" Top tube and 1⅛" down tube. The small to medium size frames use oversize tubes 1⅛" top tube and 1¼" down tube. The larger frames use extra oversize tubes 1¼" top tubes and 1⅜" down tubes. I believe that this makes sense. Small frames are inevitably stronger than large frames and riders of small frames are usually lighter than riders of large frames. The Short S frames are intended primarily for use with drop bars, or (heaven forbid) with butterfly bars. The Long L frames are intended primarily for use with straight or comfort bars. The NEW RAVEN frames still use the Standard Rohloff hub (with internal cables), they now have the beautifully functional cast stainless seat post clamp, which we have introduced to our other models. These frames also have stainless bosses and stainless cable guides. The EBB width is the same as the RST 73mm. The NEW RAVEN frames and both forks will be available in either Matt Black powder coat or in Blood Red gloss powder coat finish. We would, by default, supply your choice of fork, in the same colour as the frame but we are happy to supply the other colour fork if you wish. For example; the red frames would look good with a matt black fork and the matt black frames could look great, with the red fork...it’s your choice! 11
Page 1 and 2: Introducing the NEW ##### THORN RAV
Page 3 and 4: The Raven Tour and the Raven Sport
Page 5 and 6: Butterfly bars (Modolo Yuma bars)
Page 7 and 8: We managed to avoid falling off, ev
Page 9: SIZE 565L with Ergon grips and Zoom
Page 13 and 14: 13 The NEW RAVEN Issue 13 - AUTUMN
Page 15 and 16: 11th gear on the Rohloff is 1:1 dir
Page 17 and 18: The NEW RAVEN Fi and I have even co
Page 19 and 20: The NEW RAVEN Pedals It’s hard to
Page 21 and 22: Choose your own spec NEW RAVEN Plea
Page 23 and 24: Choice (Please circle your choice)

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