
Conversion kits: Suspension for Vespa 50-125/PV/ET3/PK/XL
- at SIP Scootershop
There are many reasons why the chassis of smallframe scooters must and should be replaced. As a guideline, the more powerful the engine, the better the chassis must be, and the older a smallframe is, the worse its original condition. Excursions with the original engine set-up are only partly enjoyable. Another reason that should not be neglected is the appearance of the Smallframe Vespa. Many of the conversion measures make the scooters stand out from the crowd, which is not necessarily a bad thing.
For which Smallframes are there conversion kits for the chassis?
Chassis conversions are very special and not possible on every scooter model. Different rims have been fitted to older Smallframes over the years. The Vespa PK models that came onto the market from the 80s onwards are exclusively on open 10" rims.
Here is an overview:
Vespa 50 N/L/R ->V5A1T 752188
9", closed rim
Vespa 50 R 752189->/V5A2T/V5A3T
9", open rim
Vespa 50 S/SR/Sprinter/Revival/90/100 1°
10", closed rim
Vespa 50/N/L/R/Special/SR, German models, Vespa 50 Special/SS/90R/ 100/125/PV/ET3/PK50-125/S/XL/XL2
10", open rim
The different models therefore also allow different chassis conversions:
Vespa 50 N/L/R ->V5A1T 752188
9", closed rim
Vespa 50 R 752189->/V5A2T/V5A3T
9", open rim
Conversion from 9" to 10" for the first Smallframe models front & rear
Steering columns for 10" and disc brakes for Vespa 50-125/PV/ET3
Conversion to ZIP front suspension
Vespa 50 S/SR/Sprinter/Revival/90/100 1°
10", closed rim
Vespa 50/N/L/R/Special/SR, German models, Vespa 50 Special/SS/90R/ 100/125/PV/ET3/PK50-125/S/XL/XL2
10" open rim. Only 100'8-10 tyres fit front and rear with SIP 2.50 rim
Steering columns for disc brakes for Vespa 50-125/PV/ET3
100 wide tyres front & rear
11" wide tyres front & rear
Conversion to ZIP front suspension
Attention: Original exhaust systems no longer fit, cylinders > 51 mm stroke necessary. Tuning exhaust systems for cylinders with 51-54 mm stroke must be adapted.
What suspension conversions are available for Vespa 50-125/PV/ET3/PK/XL/XL2 models?
Conversion to 10" 100 mm front & rear
100 tyres are about 1.2 cm wider than the standard 3.50-10" tyres on most Vespas. If you want to safely use this first stage of wide tyres on a Vespa, you need slightly wider rims to ensure a secure fit on the rim flange.
Conversion to 10" front & rear
With original 9" tyres, potholes become pitfalls, you sit up in bends and the Vespa flutters at high speeds. A conversion to 10" tyres brings a significant improvement here. Conversion forks, conversion rims or brake drum conversion kits are the solution here.
Conversion to 11" front & rear
The rim with the size 2.50-11 and 3.00-11 is the king solution in wide tyre conversion and the youngest child of the SIP wide tyre conversion kits. The 11" conversion is discreet and coherent and is only noticeable at second glance.
Conversion to ZIP/ET4 chassis
When using a PIAGGIO ZIP SP steering column, the suspension arm is positioned on the left side. The larger choice of high-end shock absorbers (all from the PIAGGIO ZIP) with a large fluid reservoir external, the shortened wheelbase and the modified geometry are the major advantages of this steering column. Added to this is the strikingly changed look.
The top brands for chassis conversion kits for smallframe Vespa at SIP Scootershop
SIP brands are of course at the forefront here, because it's not for nothing that Performance & Style is in our logo.



SIP PERFORMANCEtubeless rims, brake drums, wide tyre conversion kits, conversion forks, tyres - everything we could think of over the years to build cool and rideable customs.
SIP LEGALin order to highlight the extra homologated articles in the flood of SIP products, we have marked them with the SIP LEGAL logo.
SERIES PRO: When smaller tuning companies deliver ideas or implementations, they belong to this label.
Customers ask - SIP answers
"Which Vespa models can I convert to 100 mm wide tyres?"
In principle, all Vespa models with open 10" rim or built-in PX engine.
