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Conversion Steering Column SIP

Vespa PK50-125 S/SS/XL
for converting to disc brakes
for Vespa 125 VNA/VNB/150 VBA
with suspension arm

The braking system is often sadly neglected when it comes to tuning scooters. What use is the strongest motor when you cannot bring your scooter to a stop safely? The original PIAGGIO drum brake system is just not strong enough for tuned scooters.


In order that vintage and small frame riders can enjoy the benefits of a disc brake we have these modified steering columns available. Originally made for the VESPA PK 50- 125/ S/ XL/ SS/ Automatica models, it lends itself ideally to this purpose. These items are altered at each end, the steering lock recess has also been adapted along with the steering range stopper to fit these earlier models.


This conversion allows the use of a GRIMECA 20mm disc brake system and 10'' wheels - tyres can also be used with their better handling characteristics and much wider choice of tyre type with the necessary speed ratings. The steering column can be installed without modification to the frame of your VESPA. The mudguard however will require slight alteration in order to be fixed properly and a shortened shock absorber will restore the required angle to the trailing link suspension!


This kit only includes the modified steering column.

The attachment kit which is available separately, is ideal for those who are unsure of all the extras necessary to fit this PK 50- 125/ S/ XL/ SS/ Automatica steering column as it includes the fastenings for the column itself, its bearings, dust cover, the shock absorbers, brake assembly and speedo cable. To complete the job properly a new speedo cable, hub cap and trailing link cover should also be ordered.


SIP-TIP: To convert the rear of your scooter to 10'' wheels to match, we have converter wheels available. We recommend an upgrade to the PX motor for the earlier large frame VESPA models. Alternatively you can use a converter wheel/ brake drum. Do not forget to order a new front wheel, brake system, speedo cable and shock absorber. An adaptor will also be necessary for the rear shock absorbers fixing to the frame, to compensate for the 4mm difference between the designs.

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17480900 $48.57
98646000 $24.78
70011500 $254.74
70091000 $252.76
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This item is in stock in sufficient quantity.

3,800g / piece
Stock on hand   Amount


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Product forums
icon scootermodels This product fits the following models
divider Producer/Model divider cc divider Type divider Engine divider Yr. of Const. divider Extra
VESPA 125 125 VNT1-2 2T AC `60-`62
VESPA 125 (T1/125) (D) 125 VNA1-2 2T AC `57-`59
VESPA 125 (T2/125) (D) 125 VNB1-6 2T AC `59-`65
VESPA 150 150 VBB1-2 2T AC `60-`67
VESPA 150 150 VBA1T 2T AC `58-`60
VESPA 150 (T4/150) (D) 150 VGLA-B 2T AC `59-`65
VESPA 150 GL Touring (DK) 150 VGLA-B 2T AC `57-`58

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