Bike Pics and Specs: Thorn Sherpa Touring Bike - Lake to Lake Sitting on a Thorn - CycleBlaze

Bike Pics and Specs: Thorn Sherpa Touring Bike

THORN SHERPA

The bike for the Lake-to-Lake tour, the Thorn Sherpa, near Lake Burley Griffin in central Canberra. The heavy duty tyres have been replaced with lighter tyres since this photo.
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Frame Thorn 969, heat-treated, Cro-Mo double butted seamless cold-drawn conical tubes, frame-size 560S
Fork Reynolds 531ST threadless
Saddle Brooks B17
Racks Tubus
Pedals Crank Brothers egg beater
Wheels 26" Rigida Andra CSS (ceramic) 36 hole rims, 14g spokes,
Derailleurs Deore XT
Hubs Deore XT M770
Brakes Shimano XTR M970 V-brakes Swiss-stop blue pads
Tektro RL520 V-brake levers
Shifters Dura Ace SL-BS77 bar-end
Crankset Shimano Deore XT FC-M770 Hollowtech triple chainset 175mm
Tyres Schwalbe Marathon XR 2.0". I have replaced these with lighter Marathon Supreme 1.6" tyres since this photo was taken.
Gearing Front 22/32/44 rear 11-34 Shimano HG80 9 speed cassette.
Chain Shimano Deore HG93 114 links 9-speed.
Bars Shimano Pro LT drops 26.0mm clamp 46cm;
Stem Shimano Pro LT 1-11/8 reversible 110mm

More detail for technical enthusiasts about Thorn Sherpa geometry. Written by another Thorn Sherpa owner on the Thorn Forum:
http://www.thorncycles.co.uk/forums/index.php?topic=4245.0

Weight Unladen is 15.5kg including accessories and various attachments e.g. racks, lights, GPS, bottles (empty) before the loaded panniers and bags are attached.

With full panniers attached, the total loaded bike weight is almost 40 kg.

Ting! Tap this frame and it resonates with a sweet note.
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The frame geometry of the Thorn Sherpa is well suited to fully loaded touring on unsurfaced roads
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Nice hub and plenty of heavy gauge spokes. Must be a touring wheel.
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These XTR V brakes and the ceramic coated rims work well together. Not quite as good as disc brakes but still impressive and reassuringly effective with a full load in wet conditions. Blue Koolstop pads are very good. Worked a treat. Before the tour I replaced the nobbly, heavy 2.0" Schwalbe XR tyres with lighter, slicker 1.6" Schwalbe Marathon Supreme tyres. More detail is on the next page. This turned out to be a good move. The Supremes are much better suited to the Sherpa.
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Reynolds forks
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2" XR Schwalbe Marathon tyres on 26" wheels. Classic touring tyres and hard to find as they are no longer produced. I fitted a narrower, lighter tyre than the XRs for this tour. The XRs are tough but they are a very slow tyre on good surfaces. Schwalbe Marathon Supremes are a better choice.The light is a Knog flasher and is a supplementary light for the main Ay Up light which conveniently attaches to the lid of the handlebar bag with strong velcro dots.
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A Thorn comfortable enough to sit on for a 1000 km ride from Canberra to Melbourne.
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Cateye rear light. Tubus rack. I'll be fitting a couple of additional lightweight flashers. Last tour I rode into some heavy fog and noticed just how important the rear lights were for visibility.
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Mirrors save a lot of head turning, and the double-wrapped, wide drop bars provide several positions and room to move for hands and arms. The double-wrapping helps absorb shock to wrists, and is easier on the hands for grip.The larger mirror is a Blackburn Road Bike mirror. The smaller mirror is a Zefal 'Spy' mirror.
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Thorn Sherpa: Fully loaded the day before departure. Bike (with accessories attached) 15.4 kg. Total load of all panniers/bags/water/ food 24.3 kg. Loaded bike 39.7 kg. Rider (with riding clothes, shoes, helmet) 85.4 kg. TOTAL WEIGHT (bike+rider+load) approx. 126 kg
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Different angle. Same bike. Looks like a touring bike from here as well.
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Addition of reflective tape. Red bag is for food.
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Another view this time showing the newly acquired Click-Stand which is easy to use, convenient and light.It is used in conjunction with shock cord bands which hold on the brakes.This bike is heavy and the Click-Stand holds it easily.It is a clever gadget.
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And the rear view in the dark.

No camera flash, rear lights on.
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No rear lights on, with camera flash.
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