What does the L=L designation mean?

L=L indicates matched-set manufacturing tolerances, allowing you to use multiple belts together without prior sorting.

What is the difference between datum length and outer length?

The datum length Ld is 3550 mm, whereas the outer length La is 3567 mm.

What material is the tension cord made of?

The internal tension cord is made of polyester (PE) for stable and reliable power transmission.

Which pulley profile is required for this belt?

This belt is designed for use with standard SPA-profile pulleys.

CONTI SPA3550 CONTI V-belt SPA 3550

Name: CONTI SPA3550 CONTI V-belt SPA 3550
Brand: CONTI
SKU: 05010258
Price: 109.43 EUR
Availability: InStock

Supplier number: CONTI SPA3550 | EAN 4010858723415

109.43 tax incl.

€90.44 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 4 products in stock.

Ordered before 20:00 - delivered tomorrow 21/10/2026
Shipping costs €6.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

✆ Talk to a specialist

Reliable power transmission by Conti

Practical benefits

Smooth matched set operation: Precise manufacturing tolerances allow you to run multiple belts in drive sets without tension mismatch.
High tensile strength: The durable rubber compound with polyester tension cords minimizes stretching and ensures consistent power delivery.
Resilient in tough environments: Designed to withstand dust and wide temperature fluctuations, it delivers dependable performance in demanding machinery.

In a nutshell

The right choise for

Keep your machinery running at peak performance with the Conti Conti-V spa 3550 V-belt. Built with low-stretch polyester tension cords and a durable rubber body, it delivers dependable power transmission with minimal slippage across heavy industrial drives, hvac fan systems, and agricultural equipment. Thanks to the precise L=L matched manufacturing tolerances, you can install multiple belts together on multi-groove pulley setups without uneven load distribution or sorting. With a top width of 12.7 mm, a height of 10 mm, and a datum length of 3550 mm, this belt provides a direct replacement for worn or stretched belts, ensuring smooth and consistent operation in demanding conditions.

Product information FAQ

€109.43

In stock - tax incl.

Key features according to our expert

Length: 3550
Width: 12,7 mm
Height: 10 mm
Profile (V-belt): SPA
Reference length Ld: 3550 mm
Inner length (Li): 3504 mm; 137,952 inch
Outer length (La): 3567 mm
Material (cord): PE
Product line: CONTI V
Colour (manufacturer): Black

Product description:

Wrapped V-belts for demanding drives in all sectors of machine engineering to DIN 2215 or DIN 7753

Properties:

Temperature range from -55 °C to +70 °C
Matched-set L=L (from 1000 mm)
Electrically conductive to ISO 1813
Conditionally resistant to oil
Suitable for tropical climates
Dust-proof

All Features

Length: 3550
Width: 12,7 mm
Height: 10 mm
Profile (v-belt): SPA
Reference length ld: 3550 mm
Inner length (li): 3504 mm; 137,952 inch
Outer length (la): 3567 mm
Material (cord): PE
Product line: CONTI V
Colour (manufacturer): Black

Brand CONTI
05010258
EAN 4010858723415
Supplier number CONTI SPA3550

Frequently asked questions about this product

Answered by specialists

What are the dimensions of this V-belt?: This SPA belt has a top width of 12.7 mm, a height of 10 mm, and a datum length Ld of 3550 mm.
What does the L=L designation mean?: L=L indicates matched-set manufacturing tolerances, allowing you to use multiple belts together without prior sorting.
What is the difference between datum length and outer length?: The datum length Ld is 3550 mm, whereas the outer length La is 3567 mm.
What material is the tension cord made of?: The internal tension cord is made of polyester (PE) for stable and reliable power transmission.
Which pulley profile is required for this belt?: This belt is designed for use with standard SPA-profile pulleys.