700c / 650B Thorn ST 700 / 650B Steel Fork - Matt Black Powder
£180.00
was
Offset
£180.00
was
Manufacturer :
SJS Cycles part number :
Manufacturer part number :
Details
- For RIM BRAKES ONLY
- Manufactured using high quality Reynolds steel blades and Cr-Mo steerer
- Investment cast fork crown is lightweight, elegant and strong
- Reversible brake bosses allow 700c or 650b (584) rims to be used with cantilever or V-brakes
- Stainless steel M5 fittings for direct and secure mounting of mudguards and lo-loader front carrier
- Sufficient clearance for mudguards and 650b tyres up to 50b or 700c tyres up to 40c
- L1 Dimension (Axle to Crown Race Seat): 390mm
- Steerer: 1 1/8" / 380mm Length (can be cut shorter to required length)
- Does not include crown race seat
- Weight: 1055g when steerer cut to 300mm (-/+ 1.03g per mm)
Available in Offsets A, B and C to suit the following Thorn frames:
- Mercury Mk3
- Club Tour Mk5
- Nomad Mk3
Available in three different offsets to suit the corresponding Thorn Nomad Mk3 frames.
- Manufactured using high quality Reynolds steel blades and Cr-Mo steerer
- Investment cast fork crown is lightweight, elegant and strong
- Reversible brake bosses allow 700c or 650b (584) rims to be used with cantilever or V-brakes
- Stainless steel M5 fittings for direct and secure mounting of mudguards and lo-loader front carrier
- Sufficient clearance for mudguards and 650b tyres up to 50b or 700c tyres up to 40c
- L1 Dimension (Axle to Crown Race Seat): 390mm
- Steerer: 1 1/8" / 380mm Length (can be cut shorter to required length)
- Does not include crown race seat
- Weight: 1055g when steerer cut to 300mm (-/+ 1.03g per mm)
Available in Offsets A, B and C to suit the following Thorn frames:
- Mercury Mk3
- Club Tour Mk5
- Nomad Mk3
Available in three different offsets to suit the corresponding Thorn Nomad Mk3 frames.
Specification
Downloads
Download File
Questions & Answers (4)
Rear boss solutions?
By SE
01 May 2020
Further to last query, would SJS have rear adaptors for brake bosses? I wish to, just like the front fork, shift from a 622 rim (700c) to a 584 rim (650B). Any suggestion much appreciated. Perhaps a new frame but I have seen adaptors by about but don’t know the reputation.
SJS Customer Service:
sorry we have no such adaptors, there's no substitute for the correct thing!RT
L1
By SE
01 May 2020
Hi
My aim is to fit a 622-50 Schwalbe almotion tyre With mudguard but if I have to move to 584-50 then this brake adaptor for 700c/650B use looks ideal. Only issue is I think the fork axis hub axis to crown axis is 435, and rake is more on the Thorn fork. I can not work out how this all affects significantly? geometry and final position once I’m seated riding.
Does SJS have a diagram of geometries? I’m not sure wheee your L1 from Crown starts. In comparison, VSF Farhaad state the fork length is 435 for the T-900. If so it means the fork here has less clearance it seems for tyres and mudguards? Page 19 here from a 2012 catalogue has the model, please note the fork is aluminium. https://issuu.com/goldbachhosting/docs/vsf_katalog_2012_lr/1?ff
My aim is to fit a 622-50 Schwalbe almotion tyre With mudguard but if I have to move to 584-50 then this brake adaptor for 700c/650B use looks ideal. Only issue is I think the fork axis hub axis to crown axis is 435, and rake is more on the Thorn fork. I can not work out how this all affects significantly? geometry and final position once I’m seated riding.
Does SJS have a diagram of geometries? I’m not sure wheee your L1 from Crown starts. In comparison, VSF Farhaad state the fork length is 435 for the T-900. If so it means the fork here has less clearance it seems for tyres and mudguards? Page 19 here from a 2012 catalogue has the model, please note the fork is aluminium. https://issuu.com/goldbachhosting/docs/vsf_katalog_2012_lr/1?ff
SJS Customer Service:
if you need 435 then this fork is L1 Dimension (Axle to Crown Race Seat): 390mm this will significantly lower your head and make a steep head angle and possibly even bring the b/b too near the ground. The steering would be poor, if you need to continue this discussion it would be better by email ([email protected]) or phone +441278441522 RT
Can I use this with Magura HS11, strength wise? Great idea the reversible brake boss!
By shane eastwood
29 Apr 2020
SJS Customer Service:
yes, should be fine RT01/05/2020
Can I use this with a bike (VSF T-900) that the OEM maker adopted a 52 offset in its fork?
By shane eastwood
29 Apr 2020
I think 52 is most faithful to 50 and not 55.
SJS Customer Service:
Probably, on this fork L1 Dimension (Axle to Crown Race Seat): is 390mm, IF your bike is longer (I can't tell from the photo) then the head angle will get steeper so a fork with a little less offset than you have would be indicated. RT 01/05/2020